636 U.S. Coast Pilot 7, Chapter 15 31 MAY 2020 · 31 MAY 2020 637U.S. Coast Pilot 7, Chapter 15 ¢...

636 ¢ U.S. Coast Pilot 7, Chapter 15 31 MAY 2020

81086 (Plan A)

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170°45' 169°40' 169°30' 168°10'

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166°38'

176°29'176°38'

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Chart Coverage in Coast Pilot 7—Chapter 15NOAA’s Online Interactive Chart Catalog has complete chart coveragehttp://www.charts.noaa.gov/InteractiveCatalog/nrnc.shtml

81092

81086 (Plan D)

81086 (Plan E)

81086 (Plan G)

81086 (Plan H)

81086 (Plan B)

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14°10'STutuila Island

S O U T H P A C I F I C O C E A N

N O R T H P A C I F I C O C E A NPalmyra Atoll

SAMOA ISLANDS (U.S.)

Rose Atoll

Tau Island

Ofu Island Olosega Island

Guam

Rota Island

Tinian Island

Saipan Island

Farallon de Medinilla

Anatahan Island

Sarigan Island

Guguan Island

Pagan Island

Agrihan Island

Asuncion Island

Maug Island

Farallon de Pajeros

Alamagan Island

Howland Island

Baker Island

Wake Island

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31 MAY 2020 U.S. Coast Pilot 7, Chapter 15 ¢ 637

Pacific Islands

(1) IslandsandPacificwatersdiscussedinthischapterareotherthanthoseoftheHawai‘ianArchipelago.SeeChapter14,Hawaii,forthelatter.

(2) National Wildlife Refuges

(3) TheU.S.DepartmentoftheInterior,FishandWildlifeService,NationalWildlifeRefugeSystem,PacificReefsNationalWildlifeRefugeComplexmanagestenNationalWildlife Refuges in the Pacific region. Eight of theseRefugesconsistofwatersandsubmergedandemergentlands. The remaining two refuges, theMarianas Arc of Fire and the Mariana Trench National Wildlife Refuges,consistonlyofsubmergedlands.

(4) The eight National Wildlife Refuges are RoseAtoll (American Samoa), JohnstonAtoll,WakeAtoll,Howland Island,Baker Island, Jarvis Island,KingmanReefandPalmyraAtoll.Therefugeboundariesextendoutward12miles,exceptatRoseAtoll.Therefugesaremanagedashighlyrestrictedmarinereservestopreventthe introductionof invasive species (e.g., rats, insects,plants) and protect nesting seabirds, sea turtles, othersensitivewildlifeandcoralreefhabitats.

(5) Thewatersandsubmergedandemergent landsofNationalWildlifeRefugesaresubjecttotheregulationsgoverningtheNationalWildlifeRefugeSystemfoundinTitle50oftheCodeofFederalRegulations,parts25–38.Therefore,exceptasprovidedbyinternationallaw,theseareasareclosedtoallformsofentry,otherthaninnocentpassage,unlessspecificallyauthorizedbyaSpecialUsePermitissuedbytheU.S.FishandWildlifeService.Anentry permit is obtained from Pacific Reefs NationalWildlifeRefugeComplex(seeAppendixA,Department of Interior for address). For more information, visitthe U.S. Fish and Wildlife Service National WildlifeRefuge and Marine Monuments at www.fws.gov/pacificislandsrefuges.

(6) ENCs - US5SP30M, US5SP31M, US5SP30M, US5SP31M, US4SP30M, US4SP30M Chart - 83484

(7) The Samoa Islands (NavigatorIslands)(13°25'S.to14°30'S.;168°00'W.to173°00'W.)consistsoftwogroupsofislands,whicharecommonlyreferredtoas American Samoa and Western Samoa. The islands comprisingAmerican Samoa are Tutuila Island, Aunuu Island,Ofu Island,Olosega Island, Ta'u Island and Rose Atoll.

WesternSamoacomprisestheislandsofUpolu Island and Savai'i Island.

(8) TheSamoaIslandshavebeenpopulatedfor3,000yearsbutknowntothewesternworldforlittlemorethantwocenturies.AmericanSamoa,theonlyU.S.territorysouth of the equator, consists of five rugged, highlyerodedvolcanic islands and two coral atolls.The landareaoftheterritoryis76squaremiles.Theislandshaveapopulationofapproximately65,000,withmostpeoplelivingonTutuilaIsland.Tunafishingandcanningarethemajorindustries.

(9) The National Marine Sanctuary of American Samoa, established in 1986 and expanded in 2012,consistsofsixdistinctunits.TheseunitsincludeLarsenBay (Fagalua/Fogama‘a),FagateleBay and thewaterssurroundingSwainsIsland,RoseAtoll(Muliava),Annu’uIsland (partial) and Ta’u Island (partial). The preciseboundaries are defined by regulation. The Sanctuarycontains a unique and vast array of tropical marineorganisms, including corals and adiverse tropical reefecosystemwithendangeredandthreatenedspecies.TheSanctuaryalsocontainsareassuchasnear-shore,mid-shore,deepreef,seamount,openpelagicwatersandotherhabitatsandareasofhistoricalandculturalsignificance.(See 15 CFR 922.1 through 922.50 and Subpart J,Chapter2,forlimitsandregulations.)

(10) COLREGS Demarcation Lines

(11) The lines established for U.S. Pacific IslandPossessionsaredescribedin33 CFR 80.1495,Chapter2.

(12) Weather, Samoa Islands

(13) Theprevailingwinds,orso-calledtradewinds,comefromadirectionmorenearlyeast,blowingbetweeneast-southeast andnorth-northeast.Theyare fairly constantthroughthedryseason,butduringthewetseasontheyarefitfulandarefrequentlybrokenbyperiodsofcalm.TheislandsliewithinthetyphoonareaofthewestPacific.TyphoonsoccurfromJanuarytoMarchandoccasionallyuptothemiddleofApril.Theyeardividesitselfdistinctlybutnotsharplyintoadryseason(MaytoNovember)andawetseason(November toApril.)Thewettestmonth,January,hasarangeof5to65inchesofprecipitation.Theannualrainfallhasalsovariedthismuch.Theclimatevarieslittlefromyeartoyearbecauseofthegreatareaofwatersurroundingthegroup.Decemberisthehottestmonth,withanaverageexcessofonlyabout2°overthemeantemperatureforJuly,thecoldestmonth.


(14) Caution

(15) Caution should be exercised in the vicinity ofAmericanSamoa,asseveralFishAggregatingDeviceshave been moored at off-lying, deep-water locationsaround Tutuila Island and other positions aroundthe group. The devices may drift off position, and/or concentrations of fishing vessels may be found intheirvicinity.Thedevices are comprisedof aluminumcatamaranfloatspaintedorangeandwhite.Eachdevicecarriesawhitedaymark,fittedwiththeletterdesignationofthedevice,andaflashingwhitelight.Thedevicesoffergoodradarreturns.

(16) Rose Atoll(14°33'S.,168°09'W.),thefarthesteast

oftheSamoaIslands,isnearlysquareinshape;itssidesareabout1.5milesinlength.SandIsland,insidethereefon the north extremity, ismerely a sand spot.A largeclumpoftrees,65feethigh,standsonRoseIsland.Aboatchannelleadinginsidetheatollisclosewestofthenorthextremityofthereef.Thischannelisverydangeroustonavigateandshouldonlybeattemptedinanemergency.

(17) Rose Atoll Marine National Monument incorporatesapproximately13,451squaremileswithinits boundaries, which extend 50miles from themeanlowwaterlineofRoseAtoll.Permissionisnotrequiredfor innocent passage through these waters; however,marinersshouldexerciseextremecautiontoavoidcloseproximity (within 1mile) to reefs and emergent land,disturbance towildlife, sensitive habitats, introductionofinvasivespeciesoraccidentalgrounding.CommercialfishingisprohibitedwithintheMonument(See50 CFR 665).Moreinformationcanbefoundatfws.gov/refuge/rose_atoll_marine_national_monument.

(18) Rose Atoll National Wildlife Refugeencompassesalllandsandwaterswithinthemeanlowwaterlineoftheouterreef.EntrytotherefugeisstrictlyprohibitedwithoutpriorapprovalfromthePacificReefsNationalWildlifeRefugeComplex(SeeAppendixA,Departmentof Interior for address.) RoseAtoll NationalWildlifeRefugeismanagedasahighlyrestrictedmarinereservetopreventtheintroductionofinvasivespeciesandprotectsensitivewildlifeandcoral reefhabitatsand issubjecttofederalregulations(See50 CFR Parts 25-38).Moreinformationcanbefoundat fws.gov/refuge/rose_atoll.

(19) Tides and currents

(20) Tidal currents off RoseAtoll are reported to setnortheast and southwest, with the southwest or ebbcurrentbeingthestronger.

(21) The Manu'a Islands (14°13'S.,169°33'W.)consists

of three islands,Ofu,Olosega, andTa'ū Island,whichextendoveranareaofabout17milesinaneast-southeast/west-northwestdirection.Theislandsareabout60miles

eastofTutuilaIsland.OfuandOlosegaarejoinedbyabridge.Theseislandsaresparselypopulated.Thevillagesontheislandshaveonlyafewhundredpeople.ThereisanationalparkonOfuandTa'ūIsland.

(22) Ta'ū Island (14°15'S., 169°28'W.) is the farthesteast of the three islands which comprise the Manu'aIslands.Theislandisabout5.8mileslong,easttowest,isdome-shapedandrisestoaheightof3,170feet.Itiscoveredwithvegetation. Maafee Island islocatedcloseoffshore,about0.3milesouthofthewestextremityoftheisland.

(23) Ta'u Harbor (14°14.5'S., 169°30.6'W.), on thewestshore,hasanentrancechannel,markedbya045° unlightedrange,andleadsnortheasttoaturningbasinintheharbor.In2012,thecontrollingdepthwas14.5feetintheentrancechannel,thencedepthsof10to13feetwereavailableinthebasin(exceptforlesserdepthsto7feetinthesouthcorner.)PermissiontoentertheharboralongwithdirectionsmustbeobtainedfromtheharbormasterinPagoPagoHarbor.

(24) Theentrancechannel to theharbor iscut througha reef.Waves routinelybreakalong this reefoneithersideoftheharborentranceandmaybeencounteredinthechannelduringmoderatesurfconditions.Intransitingtheentrancechannel,attemptstotimeincomingswellsmaybedifficultduetotheunpredictablenatureofwavesystemsinthevicinity.Ifthereisanecessitytotransitthe channel during periods ofmoderate surf, low tidemaypresentsaferconditions.FaleāsaoHarbormayalsoprovidemorefavorableconditionswhenwindandseasareoutofthesoutheast.

(25) Faleasao Harbor (14°13.02'S., 169°30.10'W.)is locatedat thenorthwestpointofTa'uIsland.Severestormshavedamagedthejetty,andmarinersareadvisedtoavoidthejettywhiletransitingthechannel.Numerouscoral heads and a shallow bottom present a danger tonavigation.In2005,thecontrollingdepthwas10feetintheentrancechannel(exceptforlesserdepthsto7feetalongtheedges),thencetheharborbasinhaddepthsof9to10feetwithlesserdepthsinthenorthwestcorner.The entrance is marked by a 200.5° unlighted range.PermissiontoentertheharboralongwithdirectionsmustbeobtainedfromtheharbormaterinPagoPagoHarbor.

(26) Anchorage

(27) Faleāsao, on the northwest side of the island,affordsshelteredanchorage,in14.5fathoms,duringthetradewinds,but avessel shouldbeprepared toweighanchorwithanychange.Anchoragemaybeobtained,in13fathoms,coral,0.4milewestof Fiti'uta Point, thenortheastextremityoftheisland.

(28) Caution

(29) Anareawithaleastdepthof23fathomsisabout1.3mileswestfromthenorthwestextremityofTa'uIsland.Thisareahasexperiencedsubmarinevolcanicactivity.


(30) Currents

(31) The tidal currents at theFaleasau anchorageflowsouthwestontheebbat1to2knots,andthefloodflowsnorthwestat1to2knots.

(32) Olosega Island (14°11'S., 169°37'W.), 6 miles

northwestofTa'u Island, risesnearlyperpendicularonitswest side to a height of 2,095 feet. The coral reefsurrounding the islandconsistsof tworegularshelves,one beyond the other. There is fair anchorage, exceptduringthetradewinds,in18fathoms,coral,southofthewestextremityofOlosegaIsland,andin14.5fathoms,sand,northeastofthewestextremityoftheisland.

(33) Ofu Island (14°11'S., 169°39'W.) is separatedfromOlosegaIslandbyAsagaStrait,whichisabout0.2milewide.OfuIslandisnearly3mileslonginaneast-west direction and about 1.5miles at itswidest point.Theislandrisesto1,621feetonitssoutheastpart.Twoisletslieoffthewestsideoftheisland.Thecoastalreefextendsabout0.2milefromOfuIslandtotheseislets.Lightsareonthenorthwestendoftheisland.Thereisgoodanchorage,exceptduringstrongtradewinds,in17fathoms,sand,northwestofSunuitao Peak,attheeastendoftheisland.

(34) Ofu Harbor (14°09.8'S., 169°40.9'W.) is on thenorthwest point of Ofu Island. A dredged entrancechannelleadseasttoaturningbasininsidetheharbor.In2015,thecontrollingdepthwas18feetintheentrancechanneltothebasin,thencedepthsof14to16feetwereavailableinthebasinwithlesserdepthsinthesoutheastcorner.Stormshavedamagedtheseawalls,andmarinersareadvisedtostayclear.Offloadingandloadingofcargoisnotadvisedduringhightide.PermissiontoentertheharboralongwithdirectionsmustbeobtainedfromtheharbormasterinPagoPagoHarbor.

(35) Tutuila Island (14°19'S., 170°42'W.) is about 17mileslonginaneast-northeast/west-southwestdirection,5mileswide,andrisestoaheightof2,142feet.Awoodedmountain ridge extendsnearly the entire lengthof theislandandisextremelyrugged,especiallyintheeast.Thenorthcoastisboldandprecipitous.The100-fathomcurveliesfrom0.1to2.3milesoffthesouthcoast,about4.3milesoffthewestextremity,andfrom1.3to2.5milesoffthenorthcoast.Thereareseveralshoalareas,especiallyoffthesouthcoast,whicharebestseenonthechart.Thesouthcoastoftheislandextendsfrom Cape Matātula,theeastextremityoftheisland,inawest-southwestdirectionabout14milestoSteps Point,thesouthextremity,andthenabout5.8milesnorthwesttoCape Taputapu,thewest extremity.FromCapeMatātula to Matuli Point,1.5milessouth,thecoastisfrontedbyareefthatextendsabout0.1mileoffshore.

(36) Auasi Harbor, about 0.5milewest-southwest ofMatuliPoint,isprotectedbyajettyonthesouthwestsideandabreakwatertothenortheast.Anentrancechannelleadsnorthwest,betweenthejettyandbreakwater,into

the harbor to a turning basin. In 2005, the controllingdepthswere9feetinthelefthalfand3feetintherighthalfoftheentrancechannel,thencedepthsof5to8feetwereavailableinthebasin.

(37) Currents

(38) Currents near the coast set south-southwest,particularlywithnortheastwinds;velocitiesof4knotshavebeenobserved.BetweenTutuilaIslandandUpoloIsland (Western Samoa), a northwest current with avelocityoflessthan0.5knothasbeenfoundtoexist.AcurrentsettingsouthwestfromCapeTaputapuissaidtoproduceoverfalls.

(39) Aunuu Island (14°17'S., 170°33'W.) is 0.7 mile

south-southeast of Matuli Point. The island has twopeaks,andthereisavillageatitswestend.

(40) Aunuu HarborislocatedonthewestsideofAunuuIsland.AunuuHarborisafeederportfortheisland.SmallboatsfromAuasi HarboronTutuilaIslandfrequentlytransit between the islands.Mariners should be awarethatthelightoffthenorthwestcorneroftheisland,neartheharbor,markstheentranceandisonthesouthjetty,notthenorthjetty.PermissiontoentertheharboralongwithdirectionsmustbeobtainedfromtheharbormasterinPagoPagoHarbor.

(41) A dredged entrance channel leads east between arevettedmoleonthenorthandabreakwateronthesouthtoamooringbasin.In2012,thecontrollingdepthwas9feetintheentrancechannel,thencedepthsof7to8feetwereinthebasin.

(42) Caution

(43) A cable area extends across the channel betweenAunuuandTutuilaIslandsandisbestseenonthechart;vesselsshouldavoidanchoringinthevicinity. Nāfanua Bank,withaleastcharteddepthof3½fathoms,extends1.5miles in a southwestdirection fromAunuu Island.A rock, covered 1¾ fathom, is about 0.4 mile south-southeastofCape Fogausa.Arock,covered3fathoms,isabout1.2milessouthwestofCapeFogausabetween Faga'itua Bay and Narragansett Passage. The chartshouldbeconsultedforotherdepths.

(44) Breakers Point(14°17.4'S.,170°39.8'W.),3.5miles

west-southwest of Cape Fogausa, is the east entrancepointtoPagoPagoHarborandismarkedbyalight.In1989,discoloredwaterwasreportedinthesouthapproachto theharbor in about14°22.2'S., 170°40.7'W. Tāemā Bank,withaleastdepthof4fathoms,liesabout1.6milessouth-southeastoftheentrancetoPagoPagoHarbor.Thebankisabout2.3mileslonginaneast-northeast/west-southwestdirectionand ismarkedon thewest endbyalightedbuoy.NarragansettPassageisbetweenTāemāBankandNāfanuaBank to theeast.Thereare severalbanksinthevicinityofthepassagewhosepositionsmay


bestbeseenonthechart.Thepassageisnotrecommendedduetotheageofsurvey.

(45) Pago Pago Harbor(14°17'S.,170°40'W.),anaturalharbor locatedon the south shoreofTutuila Island, isenteredbetweenBreakersPointandNiuloa Point.Pago Pago,onthenorthwestsideoftheharbor,isthelargestvillage on the island and is the capital of AmericanSamoa;itistheonlyportofentryforAmericanSamoa.Thevillageof Utulei isclosesoutheastofthegovernmentadministrationbuildings,andthevillageofFagatogo is closewestofthesamebuildings.

(46) Prominent features

(47) Easily identified landmarks includeAunuuIsland;StepsPoint,thesouthextremityoftheisland;thesharppeakof Matafao Peak,2,142feethigh,1.3milessouthof Pago Pago; the flat, dome shape of North Pioa Mountain,1,718feethigh,ontheeastsideoftheharbor;and Fatu Rock,102feethigh,0.2milesouthofNiuloaPoint. Tauga Rock,about1mileeastofBreakersPoint,is89feethighandprominent.

(48) Routes

(49) Vesselsapproachingfromtheeastshouldpassabout2miles east and 1.5miles southeast ofAunuu Island,thenceacourseof256°shouldbesteereduntil Breakers Point Light (14°17'23"S., 170°39'49"W.) bears about025°, thence alter course to the north to passwest ofTāemāBank.Whenclearofthebank,steeranortheastcoursetointersecttheentrancerange,thencesteer342° andentertheharbortherange.Thisrangelinepasseseastof Whale Rock andwestof Toasa Rock.Vesselsanddeep-draftvessels approaching from thewestor southshouldkeepoutsidethe100-fathomlineuntilreaching14°21.0'S.,170°41.5'W., thence steer025° toclear thewestendofTāemāBank,thenproceedasdirectedabove.MarinersshouldstaywellclearofTāemāBank.Localshave noted breakers over Tāemā Bank during roughweather.

(50) Anchorage

(51) Thereisgoodanchorageintheinnerharbor,in6to25fathoms,mudandsand.ThebestanchorageforlargevesselsisatmidchannelofftheMainDock.Vesselsof1,000grosstonsormoreshouldnotanchorinlessthan15¾fathoms,astheharborbecomesnarrowandthereisnoroomtoswing.

(52) Dangers

(53) Theshoresoftheharborarefringedbyreefs,whichonthewestandeastsidesoftheentranceextendupto0.3mileoffshore.Inmostpartsthereefsaresteep-toandtheiredgesaremarkedbysurf.Thedepthsintheharborarefrom17to37fathoms.Adangeroussubmergedwreckisabout0.1milesouthofBreakersPoint. Whale Rock,covered2fathomsandmarkedbyalightedbuoyontheeastsideandToasaRockcovered2feetandmarkedbya

buoyonthesouthwestside,arethetwoprincipaldangersintheharbor.

(54) Tides

(55) Themean tidal range is2.3 feet,while thespringrangeis3feet.

(56) Pilotage

(57) Pilotageisnotcompulsorybutisadvisable;apilotisavailabledayornight.Pilotagefeesarechargedwhetherornotapilotisused.Itisrecommendedthatlargevesselsrequestapilotifdockingininclementweather.Aradiorequestforapilotshouldbemade24hourspriortotheETA. The pilot boards in 14°17.27'S., 170°40.16'W.,south ofWhale Rock. In calmweather, the pilot willembark0.75milesouthofFatuRock.Entranceatnightisnotencouraged;however,ifpreviousarrangementsaremade andweatherpermits, a pilotwill embarkduringhours of darkness. Port officials board incoming shipsalongsidethedock.

(58) Harbormaster

(59) Pago Pago Harbor Control and the harbormastermay be contacted onVHF-FM channel 16 or 6. PagoPagoHarborControlalsomonitors2182kHz.RequirednotificationstotheOfficerinCharge,MarineInspectionand/ortheCaptainofthePort,Honolulu,maybemadeinAmericanSamoato:

(60) U.S.CoastGuardLiaisonOffice,AmericanSamoa(61) P.O.Box249(62) PagoPago,AS96799(63)

Wharves(64) StationWharf(MainWharf),onthesouthsideofthe

innerharbor,hasdepthsof5¼to6fathomsalongside;however, in1987, avessel reported a least depthof5fathoms alongside.A deep-draft container wharf, 787feetlong,issituatedbetweenStationWharfandtheoildock.Theoildockhasdepthsof5¼fathomsalongside.In1992,StationWharfandtheoildockwerereportedtobe inpoor condition.The customspier has adepthof1½fathomsatthesouthwestendand3¾fathomsatthenortheastend.Thefacilitiesonthenorthshoreoftheinnerharborarereservedforthefishingfleetservingthecanneries.

(65) FromPagoPagoHarbor,theshoretrendssouthwest

6.8 miles to Steps Point (14°22.4'S., 170°45.6'W.)Midway along this stretch of shore, near the airport,a reef extends about 0.3mile offshore; the sea breakscontinuouslyonthisreef.

(66) TheshorefromStepsPointto Pupualoa Point,about2milesnorthwest,isformedpartlybyperpendicularrocksandpartlybyblocksoflava,whichextendsomedistanceseawardanduponwhichtheseabreaks.Leone Bay is entered between Pupualoa Point and Fagaone Point,


andisopentothesouth-southwest.ThereisanchoragewestofthevillageofLeone,in15to20fathoms,butitisdangerouswhenwindsare from thesouthor south-southwest.

(67) Cape Taputapu (14°19'S., 170°51'W.), the westextremityofTutuilaIsland,lies1.5mileswest-northwestofFagaonePoint.Itisamassofhigh,steeprocks,frontedby some rocky islets.Taputapu Island lies on the reefclosesouthwestofCapeTaputapu.Thefollowingbanks,withtheindicatedleastdepths,lieintheapproachtoCapeTaputapu:

(68) a.14fathoms–3.3milessoutheast.(69) b.11fathoms–2.3milessouth-southeast.(70) c.15fathoms–3.8milessouthwest.(71) d.18fathoms–3.5mileswest.(72) ThenorthcoastofTutuilaIslandisdescribedfrom

east towest. FromCapeMatātula to Pola Island, 6.5miles west, the coast is indented by numerous bays.Thecoastthentrendswest-southwest11milestoCapeTaputapu; this coast is also indented with bays. Aoa Bay (14°15.0'S.,170°35.4'W.),affordsanchorage,in16fathoms,midwaybetweentheentrancepoints. Masefau Bay,enteredwestof Tiapea Point,1.5mileswestofAoaBay,affordsanchorage,in17fathoms.Thesurroundingreefsand Nuusetoga Island,offthewestentrancepoint,narrow the anchorage. Āfono Bay, 1.5 miles west ofNuusetogaIsland,isreportedtoprovidegoodanchorage,in14fathoms,coral,exceptinnorthwinds.

(73) Pola Island (14°14.0'S., 170°40.2'W.), 1.5 milesnorthwestofAfonaBay,islocatedoffthenorthextremityofTutuilaIsland. Cockscomb Point,thenorthextremityof Pola Island, is formed by a ridge of rocks that arehigh,indented,andsteep.Anareawithaleastdepthof12fathomsisjustover1mileeast-northeastofCockscombPoint,andanareawithaleastdepthof15fathomsisabout1.5mileswestofthepoint.

(74) Fagasā Bay isabout4milessouthwestofCockscombPoint.Anchorage,protectedfromthetrades,canbehadin13 fathomsbetween theeastandwestpointsof thebay.BetweenFagasāBayand Aoloau Bay,3mileswest-southwest,therearetwosmallbaysbackedbymountains.AoloauBayaffordsgoodanchorage, in14 fathoms inmid-bay,butvesselsshouldbepreparedtoleaveonshortnoticewhenthewindsshifttothenorth.AoloauBayissmallandsurroundedbyhighmountains.A12-fathomareais1.5milesnorth-northeastofAoloauBay.Similardepthsarechartedtoadistanceof4.8mileswestofthe12-fathomdepth.

(75) Poloa Bay (14°19.0'S., 170°50.6'W.), 4 milessouthwestofAoloauBay,affordsgoodanchorageduringeastwinds,in16fathoms,midwaybetweentheentrancepoints.Vesselsshouldbepreparedtoleaveonshortnoticewhenthewindshiftstothewest.Inthisbaythereisa1to4knotcurrentthatrunsinasouthwestdirection.CapeTaputapuislocatedclosesouthwestofPoloaBay.

(76) Swains Island (11°03'S., 171°04'W.), about 195miles north-northwest of Tutuila Island (American

Samoa), is a circular-shaped island, with a diameterof about 1.5miles. The island is administered by thegovernmentofAmericanSamoa.Asteepreefsurroundstheislandanduncoversatlowwater.Theislandiscoveredwithheavyvegetationincludingpalmtreesreaching100feetatthenorthwestcornerand70to80feetontheeastside.

(77) Swains Island provides no sheltered anchorage;deep-draftvesselsareadvisedtoremainatleast0.4mileoffshoreasdepthsshoalrapidly.Thereisanchorageforsmall vessels, north of the village of Taulaga, on thewestsideoftheisland.Achartedlanding,markedbyaflagpole,isatTaulaga.

(78) Pacific Remote Islands Marine National Monument

(79) The Pacific Remote Islands Marine National Monument incorporates approximately 86,888 squaremiles within its boundaries, which extend 50 milesfromthemeanlowwaterlinesofHowland,BakerandJarvisIslands;Johnston,WakeandPalmyraAtolls;andKingmanReef.Permissionisnotrequiredforinnocentpassagethroughthesewaters;however,marinersshouldexercise extreme caution to avoid close proximity(within1mile)toreefsandemergentland,disturbancetowildlife, sensitive habitats, introduction of invasivespecies or accidental grounding. Commercial fishingis prohibited within themonument.More informationcanbefoundatfws.gov/refuge/pacific_remote_islands_marine_national_monument and www.fpir.noaa.gov.

(80) ENCs - US5SP22M, US5SP25M, US5SP22M, US5SP25M Chart - 83157

(81) Palmyra Atoll (5°53'N., 162°05'W.), about 870milessouth-southwestoftheIslandofHawai‘i,isanatollthatconsistsofmanysmallisletslyingonabarrierreefenclosing three distinct lagoons.The reef surroundingtheatollis5mileslong,easttowest,and2milesatitswidestpart.Shoalwaterextends1.8mileseastfromthesoutheastendofthereefandthesamedistancefromthenorthwestandsouthwestends.Theisletsarelow,about6 feet high, and coveredwith coconut and other treesreachingheightsof98feetandvisible12to15miles.

(82) Channels

(83) A dredged entrance channel leads through thesouthwestsideoftheatolltoWestLagoon;itistheonlyentrance to the atoll. In 2006, a depth of 18 feetwasreportedinthechannel.Depthsinthelagoonvaryfrom10 to174feet.Reefsandshoalswithin the lagoonareshownonthechart.ApieralongthenortheastedgeofWestLagoonisinpoorconditionwithdepthsof19to23feetalongside.Acurrentisreportedtosetwestintheentrancechannel.Itisnotadvisabletoenterthechannelbetweensunsetandsunrise.


(84) Anchorage

(85) Theatollshouldbeapproachedfromthewestandanchoronthebank,in72feet,sandandcoral,withthenorthwestextremityoftheislandbearing071°,2.5milesdistant, or farther in, in 48 feet, sand and coral, withthepointonthesamebearing2milesdistant.It isnotadvisabletoattempttoanchorbetweensunsetandsunrise.In 1988, a 2 knot current setting south was observedduringanorthwestfreshattheanchorage.AnchorageinWestLagoonmaybehadonlywithpermissionfromtheRefugeManager.

(86) Caution

(87) Anexplosivedumpingareaissituatedwithitscenterabout15mileswest-southwestofPalmyraAtoll.


(89) The tidal rise at PalmyraAtoll is about 2 feet atMHHWand0feetatMLW.Strongandvariablecurrentscanbeexpected in thevicinityof theatoll.Caution isadvised ifapproaching theatoll fromthesouthwestasdangeroustideripshavebeenreported5milessouthwestoftheatoll.Acurrentsetsnorthwestacrosstheentrancechannel and is particularly strong southwest of SandIsland.

(90) Weather

(91) PalmyraAtoll hasunfavorableweather and is theonly island/atoll in its latitudewhere freshwestwindsoccur. A tropical front, a result of the Northeast andSoutheastTradesconverging,hoversinthevicinityoftheatoll.NortheastTradesprevail,withanaveragevelocityof 10 to 12 knots.There are frequent squalls of shortdurationandoccasionalwindsupto22knots;typhoonsare infrequent. Rainfall is heavy and humidity high,ranging from100 to180 inches annually.Rainoccursalmostdailyandheavysquallscomeupsuddenlyfromthesouthwest,buttherearenoseverestorms.

(92) PalmyraAtoll isaU.S.possessionandaNational

WildlifeRefugeunderthejurisdictionoftheU.S.FishandWildlifeService.Therefugeencompassesallotherislands, waters and submerged lands within 12 milesfrom emergent land.Visiting vessels arewelcome butonlywithpriorapprovalfromthePacificReefsNationalWildlifeRefugeComplex(SeeAppendixA,DepartmentofInterior,foraddress.)PalmyraAtollNationalWildlifeRefugeismanagedasahighlyrestrictedmarinereservetopreventtheintroductionofinvasivespeciesandprotectsensitivewildlifeandcoral reefhabitatsand issubjecttotheNationalWildlifeRefugeSystemregulations(See50 CFR Parts 25-38).Moreinformationcanbefoundatfws.gov/refuge/palmyra_atoll.Someislandsoftheatollareprivatelyowned,includingCooperIsland,whichisadministeredbyTheNatureConservancy;personnelontheislandmonitorVHF-FMchannel16.

(93) ENCs - US5SP21M, US5SP21M Chart - 83153

(94) Kingman Reef (6°25'N., 162°26'W.) is locatedabout33milesnorth-northwest ofPalmyraAtoll. It istriangularinshapewithitsapextothenorthandisabout9mileslongeastandwestand5milesnorthandsouth.Thereefdriesonitsnortheast,eastandsoutheastedgeswithsmallislets,reportedtonotbepermanent,formingon thesesides.Theremainderof theatoll iscontainedwithintheridgewithdepthsof10to20fathoms.Breaksinthereefareonthenorthandsouthsides.Outsidetheridgethebottomslopessteeplytoover100fathoms.

(95) Thereefhasbeenreportedtobedifficulttoidentify,bothvisuallyandbyradar.Ithasalsobeenreportedtobevisibleat7mileswithoptimalconditions;inweatheritisverydifficulttosee.In2007,with8to10-footseas,anislandwassightedatabout3milesout.

(96) KingmanReef iswithin the belt traversed by theequatorialcountercurrent,whichsetseastatarateof1.3to1.8knotsinthisarea.

(97) KingmanReefisaU.S.possessionandaNationalWildlifeRefugeunderthejurisdictionoftheU.S.FishandWildlifeService.Therefugeencomapassesalllandsandwaterswithin12milesfromemergentland.ThereefisalsoaDefensiveSeaAreaandAirspaceReservationand is closed to the public. Kingman Reef NationalWildlifeRefugeismanagedasahighlyrestrictedmarinereserve toprevent the introductionof invasive speciesandprotectsensitivewildlifeandcoralreefhabitatsandissubjecttofederalregulations(See50 CFR Parts 25-38 and 665).Moreinformationcanbefoundatfws.gov/refuge/kingman_reef.

(98) ENCs - US5SP23M, US5SP24M, US5SP20M, US5SP23M, US5SP24M, US5SP20M Chart - 83116

(99) Jarvis Island (0°22'S., 160°00'W.), an island ofsand and coral formation, is located about 460 milessouth-southeastofPalmyraAtoll.Theislandis1.8mileslong east towest and about 1milewide; it rises to aheightof20feet.Anarrowfringingreef,whichdriesinplacesandhasbreakersalongthesouthshore,encirclestheisland.Therearetwobreaksinthereefonthewestside.Adaybeaconisnearthemiddleofthewestshore.

(100) Ashoalwitha leastdepthof2½fathomsextendsabout0.6milefromtheeastsideoftheisland.Thedepthsdroprapidlyoutsidetheshoalarea.Thehighestgroundliesonthewestendoftheisland.Lowshrubscovermostoftheisland;however,ithasbeenobservedwithoutmuchvegetation.

(101) JarvisIslandhasbeenreportedtolie1milenortheast(1991),1.6mileseast(1992),and1.3mileseast-northeast(1996)ofitschartedposition.


(102) Jarvis Island is a U.S. possession and aNationalWildlifeRefugeunderthejurisdictionoftheU.S.FishandWildlifeService.Therefugeencompassesalllandsandwaterswithin12milesfromemergentland.EntrytotherefugeisstrictlyprohibitedwithoutpriorapprovalfromthePacificReefsNationalWildlifeRefugeComplex(SeeAppendixA,DepartmentofInterior,foraddress.)JarvisIslandNationalWildlifeRefugeismanagedasahighlyrestrictedmarinereservetopreventtheintroductionofinvasivespeciesandprotectsensitivewildlifeandcoralreefhabitatsandissubjecttofederalregulations(See50 CFR Parts 25-38 and 665).More information can befoundat fws.gov/refuge/jarvis_island.

(103) Baker Island(0°12'N.,176°29'W.)isnearlyflatbut

risestoanelevationof20feetatitssouthwestend.Atthispointthereisasteep,sandybeachthatextendssomedistancenorth;elsewhere,theislandisfringedbyacoralreef.Anextensiveshoalwithdepthsof3to7fathomsextendsabout0.8milefromtheislandonthenorthandeastsides.Thesurfbreaksheavilyontheeastsideandthesouthwestextremityoftheisland.

(104) Baker Island is aU.S. possession and aNationalWildlifeRefugeunderthejurisdictionoftheU.S.FishandWildlifeService.Therefugeencompassesalllandsandwaterswithin12milesfromemergentland.EntrytotherefugeisstrictlyprohibitedwithoutpriorapprovalfromthePacificReefsNationalWildlifeRefugeComplex(SeeAppendixA,DepartmentofInterior,foraddress.)BakerIslandNationalWildlifeRefugeismanagedasahighlyrestrictedmarinereservetopreventtheintroductionofinvasivespeciesandprotectsensitivewildlifeandcoralreefhabitatsandissubjecttofederalregulations(See50 CFR Parts 25-38 and 665).More information can befoundatfws.gov/refuge/baker_island.

(105) Anchorage

(106) Thereisnoshelteredanchorage.Vesselslieofftheislandanddischargetolandingcraft.Thefringingcoralreef surroundingBaker Islandmakes landingdifficult.Thesouthpointoftheislandcanbeusedforlandingwhenwindsare from thenortheast.Adaybeacon isnear themiddleofthewestshore.Tangentbearingsoftheislandareunreliable.

(107) Weather

(108) Thewestsideoftheislandisleewardofprevailingwind conditions. Winds from the east predominatethroughout the year. From December to May, theprevailing winds are sometimes interrupted by westwindsandbadweather.

(109) Howland Island (0°48'N., 176°37'W.), about 38

milesnorth-northwestofBakerIsland,isalow,flatislanddevoidofvegetationotherthanafewstuntedtrees.Itisringedbyarelativelyflatcoralreefalmostcompletelyexposedat lowwaterextendingout toabout0.1mile,

exceptonthewestsidewherethereefaveragesabout80yardsinwidth.Outsidethisreefisacoralshelfextendingabout0.3to0.5mileonthenorth,eastandsouthsidesandabout0.1mileonthewestside.Thedepthsonthisshelfvarybetween2and15fathoms.

(110) Abroad,sandy,andinsomeplaces,gravellybeachslopesupwardataslightangleonthewestsideoftheisland.Onthewindwardoreastside,thereispracticallynobeachandtheislandrisesabruptlyfromthereeftoanaverageheightof12feet,with thehighestpointabout18feet inthenorthpart.AmeliaEarhartDaybeaconissituatednearthecenterofthewestsideoftheisland.

(111) HowlandIslandisaU.S.possessionandaNationalWildlife Refuge under the jurisdiction of the U.S.FishandWildlifeService.Therefugeencompassesalllands andwaterswithin12miles fromemergent land.Entry to the refuge is strictly prohibitedwithout priorapprovalfromthePacificReefsNationalWildlifeRefugeComplex(SeeAppendixA,DepartmentofInterior,foraddress.) Howland Island NationalWildlife Refuge ismanagedasahighlyrestrictedmarinereservetopreventtheintroductionofinvasivespeciesandprotectsensitivewildlifeandcoralreefhabitatsandissubjecttofederalregulations (See50 CFR Parts 25-38 and 665).Moreinformation can be found at fws.gov/refuge/howland_island.

(112) Anchorage

(113) In1966,avesselanchored0.4milefromthenorthendoftheislandin30fathoms,withtheeasttangentoftheislandbearing144°,thewesttangentbearing185°,and the daybeacon bearing 167.5°. In 1967, a vesselanchored about 0.3 mile north-northeast of the northendoftheislandin13fathoms,withtheeasttangentoftheislandbearing153°,thewesttangentbearing213°,andthedaybeaconbearing176°,distance1mile.Ifaneasterlyswellispresent,anchorageisnotadvisableatthenorthendoftheisland.

(114) Weather

(115) Winds from the east predominate throughout theyear.FromDecembertoMay,theprevailingwindsaresometimesinterruptedbywestwindsandbadweather.


(117) Wake Island (19°17'N., 166° 37'E.) lies in thePacificOceanonthedirectroutefromHawaiitoHongKong. It is a U.S. possession with an area of only 3squaremiles, consisting of three islands about 21 feethigh.Theislandsformallbutthenorthwestsideofanatollenclosingashallowlagoon.Thehigherpartsoftheislands are coveredwith fairly heavy growth of scrubbrush and ironwood trees. The entire island group is


surrounded by a shallow reef interspersed with coralpinnacles.Thereisnonaturalfreshwater.

(118) WakeIslandisjointlyadministeredbytheDepartmentoftheInteriorandactivitiesontheislandmanagedbytheU.S.AirForce(USAF)PacificRegionalSupportCenter(PRSC). The restrictions imposed upon entry into theWakeIslandNavalDefensiveSeaAreahavebeenlargelysuspended, except for theentryof foreignflagvesselsandforeignnationals;however,therestrictionsmaybere-established without notice at any time.Any vesselwithoutpurposetovisitWakeIslandrequiresapprovalprior toentering theWake IslandDefensiveSeaArea.Wake IslandPRSCDetachment 1Commander can behailed atVHF-FMchannel 16, byphone at 808–424–2222/2468,orbyemailatPACAF.PRSC.Det1@us.af.mil.EmergencyinformationonWakeIslandcanbeprovidedbyCoastGuard SectorHonoluluCommandCenter at808–842–2600.

(119) Outside of Department of Defense actions, theU.S.FishandWildlifeServicemanagesWakeAtollasa National Wildlife Refuge. The refuge encompassesthe lands and waters out to 12 miles from the meanlowwater lineof the islands,and theMarineNationalMonumentextendsout200milesfromshoretotheU.S.ExclusiveEconomicZone(EEZ).EntrytotherefugeandfishingwithintheMarineNationalMonumentisstrictlyprohibitedwithoutpriorapprovalandpermitsfromthePacificReefsNationalWildlife RefugeComplex (SeeAppendixA,DepartmentofInterior,foraddress.)WakeAtollNationalWildlifeRefugeismanagedasahighlyrestrictedmarinereservetopreventtheintroductionofinvasivespeciesandprotectsensitivewildlifeandcoralreefhabitatsandissubjecttofederalregulations(See50 CFR Parts 25-38 and 665).More information can befoundatfws.gov/refuge/wake_atoll.


(121) Two large fuel storage tanks are situatednear thewestendofWakeIsland.Severalcurrentandabandonedmilitary buildings can be seen on the island on theapproach. It was reported that a ship obtained radarcontactwithWakeIslandfromadistanceof35miles.Thecompleteoutlineoftheislandwasobservedfromadistanceof25miles.

(122) Channels

(123) On thesouthwestsideof theatoll,betweenWakeIslandandWilkes Island, there isachannel leading toasmallboatbasinatthewestextremityofWakeIsland.Theboatbasincanaccommodatethreesmallcraft,whichsupport island operations.Vessels with prior approvalshouldradiotheirETA48hoursinadvance.Anunloadingwharfissituatedonthesouthwestsideofthebasin,andaboatlandingisattheheadofthebasin.Twomooringbuoys,supportingcargooperations,arejustoutsidetheboatbasinentrancechannel.Seaconditionsoftenpermitavesseltolieoffshoreanddischargecargo;thisisreported

tobe the safest andbestmethod for largevessels.Oilisdischargedthroughahose,floatedoutonbarrelsandconnectedtoafueljettyattheeastentrancepointoftheboatchannel.

(124) Anchorage

(125) Thedepthsdropoffsharplyoutside theatoll reef,makingitunsuitableforanchorage.Thelagoonitselfisinaccessible.Themooringfacilityoutsidetheboatbasinis available to all vessels having permission to call atWakeIslandbutisconsideredhazardous.Theuseofananchor is not recommended when using the mooringbuoys.Vesselsshouldnotattempttosecureatthemooringbuoysinanonshoreorsouthwind.Ifsecuredtoonebuoywhenthewindshiftstoblowonshore,slipthemooringandleavethearea.Anyvesselsmooredtoonlyonebuoymusthaveenginesonstandby.Vesselsshouldbesecuredtothemooringbuoyswiththebowheadedeast-southeast.Smallcraftusuallyassistinmooringoperations,withthebesttimesbeingateitherhighwaterorlowwaterslack.

(126) Currents

(127) Asouth-southwestcurrentof0.5to1knothasbeenobservedinthevicinityofWakeIsland.Therehavebeenoccasionswhenthecurrentsareerraticandonshoresetshave been observed.Vessels should carefully note thesetandthedriftof thetidalcurrentsbeforeattemptingtomoor.Thetidalcurrentsinthevicinityofthemooringbuoyshavebeenobservedtosetparalleltotheshoreatarateofabout0.8knot.Thetidalrangeisfrom2to4feet.

(128) Weather

(129) Windsfromtheeastandnortheastprevailthroughouttheyear,withaveragevelocitiesof10to13knots.Galesoccuronanaverageof10daysayear.Byreasonofitsposition, the atoll is subject to typhoons and tropicalstorms;thunderstormsseldomoccur.

(130) AtWakeIsland,theinfluenceofthehigherlatitudeisnoticeable,andthemeansvarybetweenalowof77°FinJanuaryandFebruaryandahighof82°FinSeptember.InAugust themeanmaximumreaches88°F.Extremesabove95°Farerare.

(131) The annual average rainfall is only 37 inches,showing a great decrease in precipitation from thatoccurringinthelowerlatitudes.ThemonthlytotalsrangefromaJanuaryaverageof1inchinthedryseasonto7inchesinAugust.


(133) Mariana Islands

(134) Mariana Islands are comprised of the Northern Marianas and Guam.TheNorthernMarianas, a self-governingU.S. commonwealth, consists of a chain of


16volcanicislands,whichextendinanorthandsouthdirectionforadistanceofabout450miles.TheislandsinthegroupfromnorthtosouthareFarallondePajaros,Maug,Asuncion,Agrihan, Pagan,Alamagan,Guguan,Sarigan, Anatahan, Farallon de Medinilla, Saipan,Tinian,AguijanandRota.ExceptforMaug,whichisacluster of three tiny islands, all are single islands thatriseprecipitouslyasmountainpeaksofrocky,volcanicmaterialandareconspicuousfromtheoffing.Theyareagoodradartargetfromadistanceof14milesbutarereportedtogiveapoorreturnfromadistanceof28miles.Theirtotalareaisapproximately184squaremiles.Thethreeprincipalislands,Saipan(47squaremiles),Tinian(39squaremiles)andRota(32squaremiles)formtwo-thirdsofthelandareaofthegroup.

(135) Marianas Trench Marine National Monument incorporates approximately 95,216 square miles andiscomprisedof theTrench,VolcanicandIslandUnits.Only the Islands Unit includes the waters as well assubmerged landsout approximately50miles from themean low water lines of the northernmost MarianaIslandsofFarallondePajaros,MaugandAsuncion.Theemergent lands of these three northern islands are notincludedinthemonumentandareunderthejurisdictionoftheCommonwealthoftheNorthernMarianaIslands.Permissionisnotrequiredforinnocentpassagethroughthesewaters;however,marinersshouldexerciseextremecautiontoavoidcloseproximity(within1mile)toreefsand emergent land, disturbance to wildlife, sensitivehabitats, introductionof invasive species or accidentalgrounding. Commercial fishing is prohibited withinthe monument; however, sustenance, recreational andtraditionalindigenousfishingwithintheIslandsUnitisunder considerationwith a valid permit (See50 CFR 665).

(136) Mariana Trench National Wildlife Refuge and Mariana Arc of Fire National Wildlife RefugeareunitsoftheMarianasTrenchMarineNationalMonumentandincludeonlythesubmergedlandsbutnottheoverlyingwatercolumn.EntrytotherefugesisstrictlyprohibitedwithoutpriorapprovalfromthePacificReefsNationalWildlifeRefugeComplex(SeeAppendixA,Departmentof Interior, for address.) The refuges are managed ashighly restricted marine reserves to protect sensitivedeep-sea wildlife and geologic features of significantscientificinterestandaresubject tofederalregulations(See50 CFR Parts 25-38).

(137) Caution

(138) FishaggregatingdevicesintheNorthernMarianasIslands consist of an orange-colored float showing anumber.Somearefittedwithawhiteflashinglightand/oraradarreflector.

(139) Weather, Mariana Islands

(140) TheislandsoftheMarianasArchipelagohavesimilarweather conditions.Underordinarycircumstances, the

windandseasinthevicinityofGuamareeasterlydueto the Northeast Trades. Westerly winds are at timesexperiencedduringthesummermonthsasGuamisbarelywithinthelimitsoftheSouthwestMonsoon.Thesewindsarelightasarule.InthevicinityofGuam,northeasterlyandeast-northeasterlywindsprevailfor6monthsoftheyear.Thesewindsblowfromthenortheasttoeast65%ofthetimebetweenDecemberandMayandarestrongestduringthesemonths.BetweenJuneandNovember,thesurfacewindsarequitevariable;calmsarerare.Inthesoutherlyislands,thewindsshowaslightsoutherlytrendasearlyasMay.

(141) InthevicinityoftheislandsofSaipanandTinian,the steadiest winds occur when the winter monsoonandtheNortheastTradesreinforceeachother.BetweenNovemberandApril,northeastandeasterlywindsprevail70%of thetimeatratesof10to12knots.Duringthesummer monsoon (May to October) easterly windspredominate,butsoutherlytowesterlywindsalsooccur.Windvelocitiesareabout10 to11knots fromMay toJuly and 8 knots fromAugust toOctober. Landmasseffectmodifies themaritime diurnal variations so thatthesurfacewindsarestrongestat0300andweakestat1400.

(142) In the vicinity of Pagan Island, the winds aresteadiest during the Northeast Monsoon (NovemberthroughMarch).Theyblowmostly from thenortheastatanaveragerateof15knots.FromAprilthroughJune,themonsoonweakensandtheprevailingwindsbecomemore easterly. During the wet season (June throughNovember),easterlywindscontinuetopredominatebutwithconsiderablepercentagesfromsoutherlytowesterlydirections.Thewindsaremostly light, theonlystrongwindsoccurringwithtyphoons.

(143) Precipitationincreasesdecidedlyduringthesummermonths,especiallyinthesouthernislands.Thewetseason(JulythroughOctober)hasameanmonthlyaverageof10inches(254mm)ormore.Themajorrainfallconsistsofheavyshowers.Asarule,therainfalldiminishesasthelatitudeincreases.

(144) TherainyseasonatGuamisfromthefirstofJulyuntiltheearlypartofNovember,withamonthlyaverageof11to15inches(279to381mm).JanuarythroughJuneisthedriestperiod,withanaveragemonthlyfallof3.9to6.5inches(99to165mm).Marchisthedriestmonthwithanaverageprecipitationamountof3.9inches(99mm).Themeanaveragerainfallisabout101inchesannually(2,565mm)buthasrangedfrom165inches(4,191mm)in1976to67inches(1,702mm)in1973.Anaverageof30 thunderstormseachyearaffect the islandofGuam.ThemostactivemonthisAugust.

(145) TherainyseasonattheislandsofSaipanandTinianis from July to November; the dry season lasts fromDecemberthroughJune.Duringtherainyseason,withthedoldrumsbeltlyingalmostdirectlyovertheseislands,thereareincreasedshowersandnumerousthunderstormsand squalls. The dry season is characterized by fairweather,interruptedbyfrontsassociatedwithnortherly


lowpressurecentersandsomeshowers.Saipan Islandhasanaveragerainfallof86inches(2,184mm)peryearwithamonthlyaverageof13inches(330mm).Duringtherainyseason(July throughOctober) itaverages13inches(330mm)permonth.Throughouttherestoftheyear,theaverageisabout4inches(102mm)permonth.April is thedriestmonthwithanaverageofabout2¾inches(70mm).

(146) Typhoons frequently form south and east of theMarianaArchipelagoandroutinelypass in thevicinityoftheseislands.Theyareapttooccurmoreoftenduringthesummermonthsandareaccompaniedbyhighwindsandtorrentialrains.Theyseldomoccurduringthewintermonths.

(147) TropicaldisturbancesoftenoccurinthevicinityofGuam. Since 1842, at least 51 tropical cyclones havecomewithin25miles(46km)ofGuamandanother49havecomewithin50miles(93km)oftheisland.Since1980,ninetropicalcycloneshavecomewithin25miles(46km)oftheislandandanother11within50miles(93km)of the island.As recently asAugust 1992, beforeattaining super typhoon status, Typhoon Omar rakedtheislandwithwindsof105knotsandgustsinexcessof140knots.OmarwasthemostdamagingtyphoontostrikeGuamsinceTyphoonPamelain1976.Omarcausedanestimated$457millionofdamageanddestroyedorseverelydamagedover2,158homes.

(148) Tropical disturbances occur between August andJanuary in the vicinity of the islands of Saipan andTinian. Since 1842, at least 51 tropical cyclones havecomewithin25miles(46km)ofSaipanandanother53havecomewithin50miles(93km)oftheisland.Since1980,15tropicalcycloneshavecomewithin25miles(46km)oftheislandwhileanadditional15havecomewithin50miles(93km)oftheisland.AsrecentlyasDecember3,1986,SuperTyphoonKimpassedonly18miles(33km)northofSaipanandrakedtheislandwith135knotwindsandrecordrainfall.

(149) Tropicaldisturbancesusuallypasswelltothesouthof Pagan Island, but several have been experienced.August, September and October are the most likelymonths.JanuarythroughAprilistheonlyperiodbelievedtobeentirelyfreeofsuchstorms.ProbablynotmorethanoneayearpasscloseenoughtoaffectPaganIsland.

(150) Gales, other than those of tropical origination,seldomoccurinthevicinityoftheislandsofTinianandSaipan.WindsreachgaleforceinthevicinityofPaganIslandfrom2to4%ofthetime.

(151) Thunderstorms occur frequently from July to theearlypartofNovember.DecemberthroughMayarethemonthsthatarerelativelyfreefromthunderstorms.

(152) InGuam,themeantemperatureis79°F(26.1°C),themeanmaximumis86°F(30°C)andthemeanminimumis 72°F (22.2°C).The temperatures for the rest of theMarianaIslandsarequiteuniformthroughouttheyear.JanuaryandFebruaryarethecoolestmonths.Thenightsarecooler in thenorthern islands.Temperaturesabove

85°F(29.4°C)normallyoccurfrom25to28daysamonthbetweenAprilandAugust.Thedailyminimumsseldomfallbelow74°F(23.3°C)duringthesummermonths.Theyearly rangeof temperatures is3°F (2°C) in thesouthand7°F(4°C)inthenorth.Thedailyrangeisabout10°F(6°C).TheextrememaximumtemperatureonGuamis95°F(35°C)recordedinSeptember1957andtheextrememinimumis54°F(12.8°C)recordedinMarch1965.

(153) InSaipan,themeantemperatureis82°F(27.8°C),themeanmaximumis86°(30°C)andthemeanminimumis77°F(25°C).Extremesincludeamaximumof104°F(40°C)recordedinMay1977andSeptember1987andanextrememinimumof60°F(15.6°C)recordedinMarch1975.

(154) Humidity ishigh throughout theyear,but there issomewhat lesshumidityfromDecember throughMay.Theyearlyaverageisabout76%.TheJanuaryaverageis68%andtheJuneaverageis84%.

(155) FogandmistarerarelyreportedintheGuam,SaipanandTinianareas.Visibilityoflessthan¼miles(2km)can be expected on less than one day permonth.Theoccurrenceof fogaveragesonlyone to twodayseachyear.

(156) Theyearlyaveragecloudcoverisabout7/10(70%).Themaximumcoverageof8/10to9/10occursduringthesummermonths(JulytoOctober).Cloudinessishigherovertheislandsthanovertheadjacentseas.Cloudsaremorefrequentduringthedaytime.


(158) SeeSailing Directions (Planning Guide) for thePacific Ocean and Southeast Asia (Pub. 120) forgeneralinformationontides,currentsandtidalcurrentsintheregion.

(159) CurrentsinthevicinityoftheMarianaIslandsareforthemostpartwesterly.TheyarestrongestneartoandsouthofSaipanIslandandgraduallybecomeweakernorthofthatisland.InJune,theEquatorialDriftCurrentwasreportedtobestrongestduringthatseasonintheparallelof13°N.andtoruntothenorthwestatamaximumrateof1knot.InOctober,awesterlycurrentof1knotto1½knotswas reported tohavebeenexperiencedup to20mileseastofGuguanIsland,butlittleornocurrentwasexperiencednorthofthatisland.

(160) Variable currents are sometimes encounteredneartheislands.Thesearecausedbythephysicalmakeupoftheislandandbytheadditionalforceofthetidalcurrents.

(161) An almost constant southwesterly set has beenreportedalongthenorthwestcoastofGuamduringtheNortheastTrades.Thiscurrenthasbeenfeltupto10milesoffshore.

(162) In the vicinity of the Mariana Islands, the floodcurrentusuallysetswesterlyandebbeasterly;thetidalcurrentsturnattheapproximatetimesofhighandlowwater.Thesecurrentsareusuallyweak,exceptinnarrowpassages, and their directions and rates are sometimesvariable. The tidal currents are usually confused and


irregularoff the east sidesof these islands, due to theconfigurationoftheland.


(164) Guam (13°25'N.,144°44'E.),aU.S.territorysince1898, is not included in the Commonwealth of theNorthernMarianas.Thelargestandsouthernmostislandof theMarianasArchipelago,Guam is about 30mileslongandvariesfrom4to8milesinwidth.Thenorthendoftheislandisaplateauofrollinghillssetonverticalcliffsrisingtoabout490feetabovesealevel;theplateauiscoveredwithathickgrowthofjungle.

(165) Overagreaterpartofitsshoreline,Guamisfringedbyareefthatdriesinspots.Fromadistancetheislandappears flat and even. The east side is bordered bysteepcliffs.Thesouthendoftheislandconsistsofhighvolcanichillswhichare,forthemostpart,coveredwithswordgrass.Thehighesthillsarefoundinthecentralandsouthpartsof theisland.ThehighestpeaksareMountLamlam,1,332feethigh,andJumullongManglo,withaheightof1,282feet,lying5.5milesnorth-northwestofthesouthend.InthecentralrangeareMountTenjo,1,020feethigh,about5.8milesnorth-northeastofJumullongManglo;MountAlutom,about1milenorth-northeastofMountTenjo,1,074feethigh;andMountChachao,closenorthofMountAlutom,1,042feethigh,arethehighestpeaksinthatrange.Thenorthendoftheislandisaplateauofrollinghillssetonverticalcliffsrisingtoabout490feetabovesealevel.Theplateauiscoveredwithathickgrowthofjungle.

(166) Cocos Island (13°14'N.,144°39'E.)islocatedonthesouthpartof Cocos Lagoon,areefthatprojectsabout2.5milessouthwestfromthesouthwestendofGuam. Babe Island standsonthereef,about0.8mileeastofCocosIsland.

(167) Port Merizo,suitableonlyforsmallcraft,isenteredthrough Mamaon Channel,onthenorthsideofCocosLagoon.Twoprivatelightedbuoysmarktheentrancetothechannel.

(168) Umatac Bay (13°18'N.,144°39'E.),enteredabout0.5milesnorthofthesouthwestendofGuam,issmallandexposedtowestwindsandseas.Areefextendsabout0.1milewestofthesouthentrancepointofthebay.Thenorth entrancepoint is an isolated rocky elevation, onwhichthereisaruinedfort.Aruinedfortstandsonthehillnortheastofthepoint.Magellan’sMonumentstandsat theheadof theharbor.Aprominent church spire issituatednorthwestofthemonument.

(169) Anchoragecanbetaken,in7.5fathoms,sandandshells,with Machadgan Point bearing163°,distant0.17mile.

(170) Cetti Bay,enteredabout0.8milenorthofUmatacBay,hasdepthsover4.5fathomsforabouthalfwayinsidetheentrance,whereitshoalsquicklytothehead.

(171) Facpi Point (13°20'N., 144°38'E.) terminates inanisolatedrockjoinedtotheshorebyadryingreef;anelevatedtankstandsnearthepoint.

(172) TheentrancechanneltoAgat Small-Boat Harbor is1.5milesnorthofFacpiPoint.Theentrancechannelleadsnortheastfromdeepwaterintoaturningbasinandaccesschannelprotectedbyadetachedbreakwater.Theentrancechannel ismarkedby two lightedbuoys, andthe basin ismarked by private lights and daybeacons.InMarch 2017, the controlling depths in the entrancechannelwere8feet,thence8feetintheturningbasin,and5feetintheaccesschannel.

(173) Agat Bay, entered about 4 miles north of FacpiPoint,affordsgoodshelteredanchorageduringnortheastandeastwinds. Apaca Point standsattheheadofthebay.Ashoal,withadepthof2.5fathoms,liesabout0.4milewestofApacaPoint.

(174) ENCs - US4SP02M, US5SP02M, US4SP02M, US5SP02M, US5SP03M, US5SP03M Charts - 81048, 81054

(175) Apra Harbor, situated midway along the westcoastofGuam,isthemainberthingfacilityontheisland,consistingofacommercialharbor,anavalcomplexanda repair facility.Theharbor is comprisedof twomainareas;Apra Inner HarborandApraOuterHarbor.Apra Outer Harboristheprincipalcommercialportfortheisland.ApraInnerHarborhousestheU.S.Navalfacilityandacommercialshiprepairfacility.Glass Breakwater formsthenorthandnorthwestsidesofApraOuterHarborandactsasabarrieragainstmostoceanswellsfromthenorth andwest.The seaward endof the breakwater ismarkedbyalight.Theharborisextensiveandsafe,exceptduringtyphoonseason.Duringthistime,vesselsshouldbepreparedtogetunderwayatshortnotice.Vesselsareurged to contact the local authorities and the pilot forthelatestinformationondepths,currentsandregulationsconcerningentryandnavigationofthisharbor.


(177) Orote Point, the west end of Orote Peninsula,isasharpbluffabout210feethigh.Orote Island liescloseoffthenorthsideofthepoint.Orote Point Light (13°26'47"N.,144°37'11"E.),226feetabovethewater,isshownfromaconcretetowerwithablackandwhitediamond-shapeddayboardonOrotePoint.Thelightmaybeobscuredbylandfeaturesonasouthernapproach.A200-footradiotowerissouthwestofOrotePointLightinabout13°26'45"N.,144°37'10"E.

(178) COLREGS Demarcation Lines

(179) ThelinesestablishedforApraHarboraredescribedin 33 CFR 80.1490,Chapter2.


(180) Routes

(181) Vesselsfromthenorthshouldkeep5milesoffshoreuntilOrote Point bears 180°, then steer for a position2mileswestoftheharborentrance.Approachingfromthewest,MountAlutom,bearing097°andinlinewithOrotePoint,leadstoaposition2mileswestoftheharborentrance but is not easily identified. Vessels shouldenterApraOuterHarborontheentrancerange,passingmidwaybetweenthetwolightedbuoysattheentrance.Vesselsarecautionedtogivethebreakwaterawideberthbecauseofthecurrentsandpossiblesubmergedbroken-offsegments.

(182) Anchorages

(183) AnchorageoutsideApraHarborisimpossibleduetothegreatdepthsandrapidshoalingofthebottom.

(184) Naval,explosive,specialandgeneralanchoragesareinApraOuterHarbor.(See33 CFR 110.1,110.238 and 110.129a,Chapter2,forlimitsandregulations.)

(185) Channels

(186) Theapproachestotheharborarefreeanddeep,asisthechannelbetweenthebreakwaters.TheentrancetoApraOuterHarbor ismarkedby lights, lighted buoysand a 083.7°lightedrange.TheentrancetoApraInnerHarborismarkedbylightedbuoys,a141°lightedrangeand a 176°lightedrange.Inthemorningwhenthesunishigh,theaidstonavigationherearedifficulttoidentifyduetohazeandrefraction.TherangemarkingthechannelthroughOuterHarborisreadilyvisiblewithin2milesoftheharborentranceinnormalhazeconditions.

(187) Regulated navigation areas

(188) Regulated navigation areashavebeenestablishedintheapproachandinApraOuterHarbor.(See33 CFR 165.1405,Chapter2,forlimitsandregulations.)

(189) Safety zones and security zones have beenestablished in Apra Outer Harbor. (See 33 CFR 165.1401,165.1402 and 165.1404,Chapter2,forlimitsandregulations.)

(190) Apra Inner Harbor and an area just west of theentrancetotheInnerHarborareincludedinarestricted area.(See33 CFR 334.1through334.6 and 334.1430,Chapter2,forlimitsandregulations.)Aharbor security barrier gate, marked by two uncharted buoys, hasbeeninstalledacrosstheentrancetoApraInnerHarborbetweentheoutermostendsofWharvesLandB.

(191) Caution

(192) TherestrictedareaofaFiring Danger Zoneextendsoffshoreabout1milesouthofOrotePointandoff thesouthwestcoastof the island. (See33 CFR 334.1420,Chapter2,forlimitsandregulations.)Anacousticrangefacility is southof the restrictedareaanda submarineoperatingareasurroundsmostoftheisland.Submerged

submarineoperationsareconductedatvarioustimesinthesewaters;proceedwithcaution.


(194) Themean tidal range atApraHarbor is 1.6 feet,while the spring range is 2.3 feet.On the approach toOrote Point, the southwest current associated withthe Northeast Trades tends to curve to the south andsoutheast.Therateofthecurrentisgreatlyaffectedbythe force of thewind.During the typhoon season, theoutgoingcurrentfromtheharboraugmentsthesouthwestcurrentandreducesanynortheastcurrentthatmayoccur.Strong rips may be observed under these conditions.Theprevalentsetofthecurrentattheharborentranceisusuallysouthorsouthwestregardlessofthetidalcurrents,butasettothenorthornortheastmaybeexperienced,especiallyduringthesummermonths.Thefloodcurrentintheharborentrancesetsnorthtonorth-northeastatamaximumrateof1.5knots.Theebbcurrentsometimesattainsamaximumrateof3knots.Slackwateroccurs30minutesbeforelowwaterand45minutesbeforehighwater.HeavywestswellssometimesmaketheentranceofApraOuterHarbordangerous.Thisconditionoccurswhenatyphoonbuildsupinthearea,progressestothenorthwestandthencurvesnortheast.Beaconsandbuoysaresometimesdestroyedorcarriedawayatsuchtimes.Thecurrentsandtidalcurrentswithintheharborareweakandvariable.

(195) Across-currentisoftenexperiencedintheentrance.Careshouldbe takentokeepontheentrancerange.Aspeedofnotlessthan10knotsisrecommendedthroughtheentrancetoavoidtheexcessivesetbythecurrentsofftheentrance.

(196) Pilotage

(197) Pilotage iscompulsory forvesselsover500grosstons andall vessels entering theport for thefirst timeandafterdaylighthours.Pilotservicesareavailableona24-hourbasisforApraHarbor.Pilotsarerequiredtoboard inbound vessels and leave outbound vessels atAlphaHotelPilotStation(13°26'52"N.,144°35'16"E.),about2mileswestofOrotePoint,toensurethatthevesselisproperlyalignedontheentrancerange;thestationisunmarked.

(198) Towage

(199) Tugsto3,200hpareavailableinApraHarbor.(200)

Quarantine, customs, immigration and agricultural quarantine

(201) Apra Harbor is a customs and U.S. immigrationport of entry. U.S. immigration regulations apply andare enforced byU.S. Customs and Border Protection;telephone 671–472–7138, fax 671–472–7139. U.S.Customsregulationsareenforcedby:

(202) DepartmentofCustoms,GovernmentofGuam(203) CustomsandQuarantineAgency


(204) POBox21828(205) GMF,Barrigada,GU96921(206) telephone671–475–6202(207)

Coast Guard(208) TheCoastGuardCommunicationsCenterisafull-

servicecommunicationsstation.Thecenterismonitored24hoursandcanbecontactedonVHF-FMchannel16or9,callsignNRV.ASectorOfficeandStationarelocatedontheU.S.NavalbaseandcanalsobecontactedonVHF-FMchannel16or9(24hours);telephone671–355–4821.

(209) Harbor regulations

(210) All operations in Apra Outer Harbor are underthejurisdictionofThePortAuthorityofGuamandtheUnited States Coast Guard. Prior to entry all vesselsmustestablishcommunicationswithGuamPortControlHarbormaster’sofficeonVHF-FMchannels12,13or16;callsignWRV-574.ThephonenumberforGuamPortControlHarbormaster’sOfficeis671–477–8697.

(211) AlloperationsinApraInnerHarborareunderthejurisdictionoftheU.S.NavyPortControlHarbormaster’sOfficewithcommunicationonVHF-FMchannels14and16.Thephonenumberis671–339–6141.

(212) Vessels entering, leaving or shifting berth arerequiredtogiveaminimumof24hoursnoticetoThe Port Authority of Guam Harbor Master and U.S. Coast Guard Captain of the Port.Failuretogivesuchnoticeisabasisfordenyingentry.Novesselshallenteror leave the harbor without radio clearance from theHarbormaster.VesselsmustbeISPS/MTSAcompliant.

(213) Atugboat(ortugs)shallbeusedbyallcommercialvessels exceeding 250 feet in overall length entering,leavingoroperatingwithintheharbor,exceptresearchvessels and vessels up to 300 feet in overall lengthequipped with an operational bow thruster. A fishingvessel’suseofaskiffboatinlieuofatugboatispermittedprovided there isconstantcommunicationbetween theskiffoperatorandthevesselMaster.

(214) Speedislimitedtonomorethan12knotsinOuterHarborandnomorethan5knotsinInnerHarbor,exceptinemergencysituations.

(215) Wharves

(216) Guam’s commercial port is situated on Cabras Island inOuterHarbor.The PortAuthority ofGuam,anautonomousagencyoftheGovernmentofGuam,isresponsible for the management of the port’s 33-acresite.Thefacilityoffers0.15mileofdockingspaceforcontainer, break-bulk, fishing and passenger vessels.The Guam Economic and Development AuthorityadministerstheCabrasIslandIndustrialParkadjacenttotheCommercialPort,whichincludesafuelwharfandafloatingdrydock.Thecommercialportoffersalongsidedepthsof5.3to10.8fathoms.

(217) TankvesselsdischargeattheMobilPier(WharfG),whichhasalengthof223feetandanalongsidedepthof

9.6fathoms,andalsoattheGIROCOPier(WharfF-1),whichhasalengthof797feetandanalongsidedepthof10.8fathoms.TheMobilPierissituatedabout0.2milewestoftherootofGlassBreakwater,whiletheGIROCOPierispositionedabout0.3milesoutheastoftheMobilPier.

(218) Supplies

(219) ApraHarbor is theprincipalsupplycenterfor theregion.Waterisavailableatmostwharves.BunkerfuelisavailableatGolfPier,BerthsF-1andF-3andbytankertruck.

(220) Repairs

(221) ApraHarborhasafloatingdrydockthatcanhandleamaximumLOAof700feet.GuamShipyard,POBox13010, Bldg. 20 Comnavmar, Santa Rita, GU 96915-3010;telephone671–339–1101or671–339–5258.


(223) Asan Point (13°28'N.,144°42'E.)isrocky,steepandfringedbyareef.Alargerockstandsontheouterendofthereef.

(224) Hagåtña Bay, 8 miles north-northeast of ApraHarbor, is formed by a slight indentation of the coastbetween Adelup Point and Oca Point.Theshoresofthebayarelow,sandyandfringedbyawidereef.Hagåtña,thecapitalofGuam,standsalongtheshoresofthebay.Thecityconsistsofalargenumberofbuildings,someofconsiderableheight.

(225) Hagåtña small boat harbor is on the south sideHagåtñaBayandisapproachedfromthenorthdirectlyoffshorethroughthereef.Anentrancechannelleadssouthbetween two breakwaters to a turning basin inside. In2017,thecontrollingdepthswere12feetintheentrancechannelwith10to12feetintheturningbasin.Theentrancethroughthereefismarkedbylightsanda186.8°lightedrange.Marinersunfamiliarwiththechannelshouldnotattemptentrancewithoutassistanceorduringotherthandaylighthourswithfavorableconditions.Assistancecanbe requested from theHagåtñaHarborPatrolon2136kHzdailyfrom0600to1400.

(226) Anchorage,withwindsbetweentheeast-northeastandsouth,maybeobtained inHagåtñaBay;however,itisanopenroadsteadwithasteep-tobottomandgreatdepths.A strong current has been reported offAdelupPoint.

(227) TheshorebetweenOca Point(13°30'N.,144°46'E.)and Ritidian Point, the north extremity of Guam, isrockyandsteep.

(228) Tumon Bay is entered between Ypao Point and Amantes Point and is nearly inaccessible, except forboatswithlocalknowledge.Awatertank,paintedred,standsabout0.5mileinlandofthebay’shead.


(229) ThenorthcoastofGuam,between Ritidian Point and Pati Point,isreeffringedandfullyexposedtotheNortheastTrades.

(230) TheeastshoreofGuam,fromPati PointtoTalofofo Bay,isruggedandsteep.Thisstretchofcoastlineaffordsnoshelter—theonlyopeningsbeingYligBayandPagoBay—and should be avoided during the NortheastMonsoon.

(231) Ylig Bay isenteredthroughadeepchannel,about197 feetwide.The reef on either side of the entranceuncovers at half tide and is marked by breakers. Thebottomshoalsabruptlymidwaybetweentheouterreefandtheheadofthebay.Reefs,foulgroundandshoalsarefoundalongthesideofthechannel.The Ylig River dischargesintotheheadofthebay.Anarrowsandybeachextendsnorthfromitsmouth.Avesselanchoredin40fathoms,goodholdingground,justoutsidetheentranceofthebay.

(232) Talofofo Bay (13°20'N.,144°46'E.),enterednearly4milessouthofYligBay,affordsshelterinitsentranceindepthsof8fathoms,mud;depthsdecreasegraduallytoitshead.Thisbayhassteephillsonallsides.Thoseonthenorthsiderisesharplyto410feet,withaprominentcliffformingthesummit.The Talofofo River,thelargestinGuam,dischargesintotheheadofthebay.

(233) Inarajan Bay,enteredabout4milessouthwestofTalofofoBay,isopentothesoutheastbutaffordssheltertosmallcraftwithlocalknowledgeduringwestwinds.Thereeffringingthesouthwestsideoftheharborissteep-to.Thereisasandybeachattheheadofthebay.Thespireofachurchnearthevillageof Inarajan,situatedonthesouthwestsideof theharbor, isprominent.Thedepthsdecreasesharplyfrom12to3fathomswhenwithinabout0.2mileoftheentrance.Reefsandfoulgroundarefoundoneachsideoftheinnerbay.Ashoal,withadepthof2.8fathoms,liescloseoffshore,southofthesouthentrancepoint.

(234) Agfayan Bay, lying 1.5 miles north-northeast of Aga Point, open east and small, is only suitable forsmallvesselswithlocalknowledge.Thisbaymayaffordanchorageforvesselswithdraftslessthan15feetwithlocalknowledge.Thereisaprominentrockonthesouthsideofthebay.

(235) Ajayan Bay,enteredonthewestsideofAgaPoint,thesoutheastendofGuam,isobstructedbyreefsandisdangeroustoapproachifthereisanysea.


(237) Rota Island (14°10'N., 145°12'E.), of volcanicformation, is about 32 miles northeast of Guam. Thenortheast part consists of a plateau 522 feet high; thesouthwesterlypartisalowsandyisthmus.TheshoreofRotaisgenerallysteepandrockyexceptatthesouthwesttip;anarrowcoralreefnearlyfringestheentireisland.Rotarisesto1,611feetinitswest-centralpart.

(238) Caution

(239) AnavaloperatingareaisoffthenortheastshoreofRota.

(240) Tidal currents

(241) The diurnal inequality is considerable. The floodattainsarateof½knot.Thefloodsetssoutherly,theebbnortherly,turningataboutthetimeofhighandlowwater.

(242) Harnom Point (Puntan Taipingot) (14°07'N.,

145°07'E.) is the south endofTaipingot, a prominentheadlandwithadistinct “weddingcake” shape,whichformsthesouthwesterlyendofRotaIsland.

(243) Sasanlagu, situated on the northwest side ofthe Taipingot Peninsula, affords some shelter duringsoutheasterlywinds.Rota West Harbor,onthesoutheastsideofSasanlaguand0.5milesouthwestofthevillageofRota(SongSong),istheonlycommercialportservingtheCommonwealthoftheNorthernMarianaIslands.Anentrancechannel,markedbya118°lightedrange,leadssoutheasttoaturningbasininsidetheharbor.In2007,theentrancechannelhadacontrollingdepthof18feetandtheturningbasinhaddepthsof11to14feetexceptforshoalingto6feetintheeastcornerofthebasin.Astrongcurrentrunsalongthecoastinasouthwestdirection.Itis funneled between Mafuiion Rock and the fringingreef, causing extreme difficulties in bringing vesselsintotheport.Enteringtheportexceptatslacktideisnotrecommendedwithoutlocalknowledge.

(244) Pilotage is compulsory for vessels greater than300 gross tonnage. There are no pilots in Rota, butpilotage canbe arrangedby contactingSaipanMarineCorporationat670–322–7345/46/51.Arrivalatnightisnotpermitted.There isnoanchorage insideRotaWestHarbor; however, anchorage can be permitted outsidetheharborbycontactingRotaPortControlonVHF-FMchannels13or16.TugsandbargesarenotavailableinRota.Pilotsrequireavesselwithtwinscrewsorasinglescrewwithstrongbowthrustertoentertheharbor.Vesselsover236feetdonothaveswingingroominsidethebasin.

(245) RotaWestHarborhastwoberthingfacilities:Berth1is150feetinlength,16feetalongside;andBerth2is100feetinlength,11feetalongside.Forkliftsto3tonsandan80-toncraneareavailableattheharbor.Stevedoringservices are available by Rota Terminal & Transfer(RT&T), Monday–Saturday, and can be contacted at670–532–3117or670–532–5270.Theharborisownedand operated by the Commonwealth Ports Authority(CPA).HoursofoperationareMonday–Saturday0730to1630.OthertimesmaybearrangedbycontactingtheCPA(670–532–9497/89)andotheragenciesneeded toprovideportservices.Advancenoticeofatleast24hoursisrequiredtoprovideadequateservices.Aboatrampandseveralsmallboatslipsareavailableintheharbor.


(246) Quarantine, customs, immigration and agricultural quarantine

(247) Customs, quarantine and immigration offices areinRotaWestHarbor.HoursofoperationareMonday–Saturday 0730 to 1630 for customs and quarantine,Monday–Friday 0730 to 1630 for immigration. Othertimesmaybearrangedbycallingcustomsoffice670–532–9484/88, quarantine office 670–532–3415/9494,immigrationoffice670–532–9436.

(248) Sasanhaya is a bayon the east side ofTaipingot

andsouthofthevillageofRota.AnchoragecanbehadinSasanhaya;however,aswellsetsinwithwindsfromanydirectionexceptnortheast.Whennortheasterlywindsarestrong,theyoftenblowdownfromthesteepslopesattheinnerpartofthebay.Anchoragemaybefoundindepthsof16fathoms,about0.4milesouthofthevillageofRota(SongSong).Duringnortheasterlywinds,goodanchoragemaybefoundontheeastsideofthebay.

(249) Off-lying danger

(250) A bankwith a depth of 22 fathoms is about 120miles,273°fromHarnomPoint(PuntanTaipingot).

(251) ENCs - US2SP01M, US2SP01M, US4SP05M,

US4SP05M Charts - 81004, 81067

(252) Aguijan Island(14°51'N.,145°33'E.)isabout022°,42milesfromRotaIsland.TheshoreofAguijanIslandissteepandinaccessible.NaftanRockisabout½milesouthwestoftheisland’ssouthwestend.

(253) Off-lying banks and dangers

(254) Esmeralda Bank, about 17 miles northwest ofAguijan Island, has a least depth of about 33 fathomsandcanberecognizedbythediscolorationofthewater,which has the appearance of sulphur being emitted.A30-fathom bank, marked by boiling sulphur, is about20milesnorthwestofAguijanIsland.Otherbankswithgreaterdepthsarechartedinthisvicinity.

(255) Abankwithadepthof19fathomsoveritisabout5milessouthwestofAguijanIsland.

(256) Tatsumi Reef,centeredabout2milessoutheastof

thesouthernendofTinianIsland,isonthenortheastsideofTinianChannel.Apatchwithadepthof13fathomsoveritis14mileswestofthenorthendofTinianIsland.

(257) ENCs - US4SP05M, US4SP05M, US5SP06M,

Tinian Harbor, Northern Mariana Islands2004

N

(265)


US5SP06M Charts - 81067, 81071

(258) Tinian Island (15°00'N., 145°38'E.) is northeastofAguijanIslandand it isseparatedfromitbyTinianChannel.Thenorthendoftheislandislowandflat.

(259) Tinian Island is an experimental cattle raisingcenter.The island is extensively cultivated;vegetablesandproduceare shipped toGuam.Tinian is a transferpointfortunapurseseiners.Aninter-islandtugandbargereportedly visits the island several times a week. Thepopulationwas3,540(2000).


(261) Lasso Hill,564feethigh,isthesummitoftheislandandliesabout3¾milessouthofthenorthendofTinianIsland. Maga Hill, amile northwest of LassoHill, isjoinedtothelatterbyaridge.Thelandsouthofthisridgeisslopingandforthemostpartcultivated.SeveralradiotowersareprominentontheslopewestofMagaHill.

(262) Anextensiveridgeislocatedalongtheeastsideofthesouthpartoftheisland,betweenPuntan Carolinas and Puntan Masalok.Thecoastbetween thesepointsisfacedbyasheercliff.Thebroadandcultivatedlandinthecentralpartoftheislandgiveswaytonarrowandsuccessivelylowerterracesnearthecoast.Theselevelsare separated by steep slopes or cliffs. Sandy beachesarefoundnearthetownofTinianandinthebaybetweenPuntanMasalokandPuntanAsiga.

(263) Manychartedlandmarkswereeithernonexistentorwereovergrownwithfoliage(1963).

(264) Tinian Harbor isthenamegiventothearealying

offthesouthwesternshoreofTinianIsland,frontingthetown, and including the swept areabest shownon thechart.

(266) TheinnerharborareaoffTinianisprotectedfromtheseabyabreakwaterconstructedonthereefthatfrontsthetown.Thenorthendofthebreakwaterwasinruins(2005). An entrance channel, marked by lighted andunlighted buoys, is entered about½mile south of theheadofthebreakwaterandleadsnortheastandnorthwesttoabasinoffthetownofTinian.Asmokestackisabout0.6mile north-northwest of the inner harbor in about14°58'25"N.,145°36'55"E.

(267) Routes

(268) Acourseof035° leadsthroughthefirstlegofthechannel toapositionsoutheastof theouterendof thebreakwater,thenacourseof336°leadstothemainquay.

(269) Anchorages

(270) Anchorage may be found in depths of 10 to 20fathoms,sandandcoral,goodholdingground,offTinian;however, it is unsafe during the SouthwestMonsoon.Duringwesterlywindsanchoragemaybefoundinabay

on thenortheast side ofTinian IslandbetweenPuntanMasalokandPuntanAsiga,indepthsof15to25fathoms;however, this anchorage is reported untenable duringstrongeasterlyandnortheasterlywinds.

(271) Explosive anchorages are off the west shore ofTinianIsland,offPuntan Diapblo(See33 CFR 110.239,Chapter2,forlimitsandregulations.)

(272) Asecurity zoneisoffthewestshoreofTinianIsland,

betweenPuntanDiapbloandthevillageofTinian(See33 CFR 165.1403,Chapter2,forlimitsandregulations).


(274) At times the tideswillbecomediurnalaroundthetimeofthemoon’smaximumdeclination.Thecurrentsset northwest on the flood and southeast on the ebb,attainingratesofaboutaknotandturningataboutthetimesofhighandlowwater.

(275) Pilotage

(276) Vessels must obtain permission and acquire apilotfromtheauthoritiesatSaipanbeforeenteringtheharbor.Enteringandexitingportispermittedonlyduringdaylighthours,and“TinianPortControl”monitorsVHF-FMchannel16.

(277) Wharves

(278) TheMainQuayhasalength2,000feetwithdepthsof 17 to 20 feet alongside. Pier 1 and Pier 2, off thenorthwestsideofMainQuay,werereportedinruinsandunserviceablein2005.

(279) ENCs - US4SP05M, US4SP05M, US5SP06M, US5SP06M, US5SP07M, US5SP07M Charts - 81067, 81071, 81076

(280) Saipan Island (15°10'N., 145°45'E.), the secondlargest of the Mariana Islands, is northeast of TinianIsland and is separated from it by Saipan Channel.SaipanChannelisdeepandclearofknowndangers.


(282) Achainofmountains,thesummitofwhichis Okso‘ Takpochao, 1,555 feet high, a conspicuous, conical,extinctvolcano,linesthecenteroftheislandinanorth-south direction.The east peninsula and the south partoftheislandarelowflatplateaus.Somerelativelylevelareasarefoundonthenorthendandnorthwestandwestsidesoftheisland,betweenthecoastandthelowerslopesoftheridge.Theseareasareforthemostpartcultivated.Thelandonthewestandnorthwestsidesslopesdowntothebeaches.Thenortheastandsoutheast shoresof theislandareformedbyrugged,rockycliffs.

(283) Thewestandnorthwestshoresarefrontedbybarrier

reefs,withinwhichareshallowlagoons.Detacheddangers


andfoulgroundcontainingmanycoralheads,withdepthsof3fathomsorless,extendaboutamilesouthwestfromthesouthwestextremityofthebarrierreefthatfrontsthenorthwesterlyendof the island.Anumberofdetacheddangersliesouthofthisfoulground,alongtheedgesofthesweptanchoragesareas.

(284) VesselsapproachingtheislandwillfirstsightOkso‘Takpochao.Vesselspassingsouthoftheislandwillnextsight Fina‘ Sisu,the295-footsummit,located2¾milessouth-southwestoftheabovepeak.Thissummit,whenfirstseen,appearsasadetachedisland. Isleta Managaha,locatedoff thenorthwestcoast, appearsasadestroyerwhenviewedfromthewest.

(285) An abandoned lighthouse, 43 feet high a whitecircularconcretestructure,standsatanelevationof375feet,aboutamilenortheastwardofthepieratGarapan.Tworadiomasts,markedbyobstructionlights,arecloseto the abandoned lighthouse.Five radio towers areonPuntan AginganandarereportedtoserveasoneofthemostvisiblelandmarksonSaipan.

(286) SaipanHarborisreportedtoberadarconspicuousatadistanceofabout20miles.

(287) Saipan Harbor(15°12'N.,145°41'E.),lyingonthewestsideofSaipanIsland,includestheouteranchorage, Garapan Anchorage, and the inner harbor, Puetton Tanapag.

(289) Routes

(290) Vessels entering Puetton Tanapag should makethe approachwith the light on IsletaManagaha aheadbearing 044°,passingoneithersideofthefairwaybuoy.WhenapproachingLightedBuoyNo.3,courseshouldbealteredto088°withtheharborentrancelightedrangelinedup.Thiscourseleadsintoandthroughtheharbor.

(291) Channels

(292) The northern part of Saipan Harbor, Puetton Tanapag,isenteredthroughadredgedchannelthatleadsnortheast,thenturnseasttoaturningbasin.Theentrancechannelismarkedbylightedbuoysandasectorlight—the channel to the turning basin ismarked by lightedbuoys and a 088.1° lighted range. In 2009–2010, thecontrollingdepthwas36feetinthechanneltothebasin,thencedepthsof32to40feetwereavailableinthebasin.

(293) Vessels are urged to contact the local authoritiesandpilotsforthelatestinformationondepths,currentsandregulationsconcerningentryandnavigationofthisharbor.

(294) Anchorages

(295) The outer anchorage affords shelter duringprevailing easterly winds but none during infrequentwesterlystorms.Thisanchorage,whichliesfrom3to5

Saipan Harbor, Northern Mariana Islands2004

N

(288)


milesoffshore,issuitableonlyasatemporaryanchoragefor largevessels.The inneranchorage,which includesGarapan Anchorage, contains numerous berths withdepthsrangingfrom25to100feet,holdinggroundfairtogood,withcoarsecoralsand.Thisanchorageliesfrom1to2milesoffshore.Vesselscananchorin10fathoms,sandbottom,about0.8mileoffshore,abreastFina‘Sisu,offthevillageof Chalan Kanoa.Vesselscananchorin12to14fathoms,coralbottom,inapositionabout1.5milesoffGarapan.TheanchorageareainPuettonTanapaghasdepthsrangingfrom12to30feet.Aseaplanelandingareaisnorthwardoftheanchoragearea.

(296) Regulated navigation area

(297) A security zone has been established in SaipanHarbor.(See33 CFR 165.1405,Chapter2,forlimitsandregulations.)

(298) Caution

(299) Aseweroutfallextendsfromapositionabout200yardssouthwestofthesouthwestcornerofPierCtoapositionabout600yardsnorth-northwestofthenorthwestcornerofthesamepier.

(300) UnexplodedordnancehasbeenreportedtoliewithinAnchorageBerthL8.

(301) Okino Reef (15°12'41"N., 145°41'48"E.), anisolatedshallowareainGarapanAnchorage,hasaleastdepthof6feetandismarkedbyabuoyonthewestside.

(302) Somemooringbuoysandmanywrecksare in theharbor.

(303) Two mooring buoys are just outside the reef offPuntan Susupi.

(304) Tidal currents

(305) Themeanmaximum tidal range is about 2.6 feetandtheminimumrangeisabout0.7feet.TidalcurrentsinSaipanChannelsetnorthwesterlyatarateof2½knotsonthefloodandsoutheasterlyat1¼knotsontheebb,turningataboutthetimesofhighandlowwater.IntheouteranchorageofSaipanHarbor,thetidalcurrentsareirregular,withamaximumwest-northwestsetofabout2knotsduringtheflood.InGarapanAnchorage,thetidalcurrentssetnortherlyatratesof½to1knotduringthefloodandsouthwesterlyatratesof½to¾knotduringtheebb.InPuettonTanapagthetidalcurrentssetnorthonthefloodandsouthontheebb,neitherexceedingarateof¾knot.Theyappeartoturnattimesofhighandlowwater.

(306) Pilotage

(307) Pilotage is compulsory for vessels of 300 grosstonsandover.Pilotsrequirea24-hournoticeandboardvessels in the vicinity of Tanapag Harbor ApproachLightedBuoyT.

(308) Harbormaster

(309) The Harbormaster Control Tower is manned 24hoursandmaybecontactedonVHF-FMchannel16or670–322–9973.

(310) Wharves

(311) Theportprovides2,600linearfeetofberthingspaceanda22-acrecontaineryard.Water,fuel,electricityandsewagepump-out are available.Amarina is about 0.5milesouthwestoftheportfacilities.

(312) Bahia Laolao (BahiaLaulau) is on the southeast

sideofSaipanIsland,affordingtheonlyshelterwiththewindbetweenwestandnorth,butduetoexcessivedepthsitcan’tberecommended.Vesselsmayobtainanchorageinadepthofabout30fathoms,about600yardsoffshore,southofthevillageofLaulau.

(313) Off-lying banks and dangers

(314) Abank,withaleastdepthofdepthof28fathomsisabout9½milesnorth-northeastofPuntan Sabaneta (15°17'N.,145°49'E.).

(315) ENCs - US2SP01M, US2SP01M, US4SP08M, US5SP08M, US4SP08M, US5SP08M, US5SP09M, US5SP09M Charts - 81004, 81086, 81092

(316) Arakane Reef (15°38'N., 145°45'E.), about 175mileswestofSaipanIsland,isacoralreefwithaleastdepthof5fathoms.In1945,aheavyswellwasobservedoverArakaneReef;discolorationwasverynoticeable.

(317) Farallon de Medinilla (16°01'N., 146°05'E.)265feethighandguanocovered,hassteepcoasts formingprecipes.Deepcaves are foundon the southandwestshores.Achasm,locatedinthesouthernpartoftheisland,separatesthatpartfromthenorth.FarallondeMedinillawasreportedtoberadarconspicuousfromadistanceof23miles.

(318) Arockybank,withaleastdepthof8.7fathoms,isabout0.3milenortheastofthenorthendoftheisland.Anotherbankwithleastdepthof3.9fathomsisabout1.3milesnorthoftheisland;thebankismarkedbybreakersinheavyweather. In1964,adepthof10 fathomswasreportedabout9mileswest-northwestofthenorthendofFarallondeMedinilla.

(319) Caution

(320) Farallon de Medinilla is used as a bombing andstrafing target complex by the U.S. Navy. Marinersareadvisedtoavoidtheareabyaswideamarginasispracticable.

(321) Anatahan Island(16°22'N.,145°40'E),2,585feet

high,isabout20milesnorthwestofFarallondeMedinilla


and is of volcanic formation.The crater of a dormantvolcano, which contains a wide grass-covered field,formsthesummitoftheisland.Thecraterwallhasapeakonitseastandwestsides,thewestonebeingquitesharp.

(322) SmallvesselscananchoroffthenorthernpartofthewestcoastofAnatahanIsland,about600yardsoffshore.Abank,withadepthof37fathomsoverit,isabout18mileseastofAnatahanIsland.In1974,anotherbankwithadepthof35fathomwasreportedtolieabout10milesfarthernorth-northeastoftheisland.

(323) A12-fathomdepthisin17°09'27"N.,143°13'19"E.An8-fathomdepthhasbeenreportedtobein16°30'18"N.,143°09'04"E.

(324) Sarigan Island(16°43'N.,145°47'E.),lyingabout20milesnortheastofAnatahanIsland, iscone-shaped,woodedandofvolcanicorigin;risingtoaheightof1,801feetinitssouthernpart.

(325) <DeletedParagraph>(326) Zealandia Bank,about11milesnorth-northeastof

SariganIsland,iscomprisedoftworocksthatdry,lying½mileapart.Theseabreaksontheserocksatalltimesandthebreakerscanbeseenfromadistance.Itwasreportedthattherewasadepthof11fathomsaroundbothrocksandthattherearenootherdangers.

(327) Guguan Island(17°19'N.,145°51'E.),lyingabout35milesnorthofSariganIsland,hastwosummits;thesouthernis988feetandthenorthis814feethighandisanactivevolcano.GuguanIslandisreportedtobeagoodradartargetfromadistanceof27miles.Alargequantityof sulphur covers the ground around the crater.Whenseenfromeastorwest,thenorthernsummitappearstobecoveredwithsnow.Thecoastsaresteep,andthereisvegetationandbreadfruittrees.

(328) Alamagan Island (17°36'N.,145°50'E.), lying15miles north of Guguan Island, is an inactive volcanowithtwopeaks,thehigherbeing2,441feet.Theislandisreported toberadarconspicuousatadistanceof31miles.Theshoresarelinedwithrocksandthesoutheastsideisasteepslopeofbarelava.Thereisahotspringatthenorthendofthewestcoast.

(329) Shoalswithdepths35and26fathomswerereported(1946 and 1970, respectively) to lie about 165 mileswestofAlamaganIsland.Abank,withaleastdepthof4fathomsoverit,isinabout18°05'58"N.,143°07'36"E.

(330) Anchorage

(331) Anchorage may be found, during northeasterlywinds,offthesouthwestsideofAlamaganIsland,about600yardsoffshore,in12fathoms,sandbottom.

(332) Pagan Island(18°07'N.,145°47'E.)lyingabout30

milesnorthofAlamaganIsland,hastwoactivevolcanoes.Mount Pagan,1,870feethigh,risesinthenorthernandlarger segment of the island. Several volcanic cones,someofwhichgiveoffsteam,arelocatedinthesouthernpartof theisland.Ahotspringliesontheeasternsideofthesouthernpartoftheisland.Thetwopartsofthe

islandareconnectedbyanarrow,buthigh,isthmus.Theislandisrugged,exceptforalowlevelmarshlandlyingsouthofMountPagan.Two lakesare locatedbetweenthe mountain and the northwest coast. The westernlake,whichisseparatedfromtheseabyasandbar50yardswide, is salty.Theshoresof the islandaresteepandrocky,exceptforsomesandybeachesalongApaanBay.Casuarina and coconut trees grow alongmost ofthecoastlineandlowerslopes,buttheupperandsteeperslopesofthevolcanoesappearalmostbarren.Apaan Bay isanopenbightoffthemiddleofthewestsideofPaganIsland.Thebeachisforthemostpartsteep,exposedtosurf and has a thick growth of shrubs.Shomushon, asettlement that containsmost of the population of theisland,islocatedattheheadofasmallinletthatindentsthenorthernendofthebay.

(333) Anchorage

(334) AnchoragemaybefoundinApaanBayinadepthof about 9 fathoms, southwest of Bandeera Rock, aprominentrock,161feethigh,lying600yardsnorthwestofShomushon.Thisanchorageisshelteredfromwindsbetweennortheasterlyandeasterly,butduringwesterlywindsheavyseassetin,makingtheanchoragedangerous.

(335) <DeletedParagraph> (336) Agrihan Island (18°46'N.,145°40'E.),lyingabout

33 miles north of Pagan Island, has two peaks. Thehighestpeakrisesto3,166feet.Theislandisofvolcanicoriginandhasalargecrater.Thesouthwestsideformsagentle slopewith a shoreof black sand.Agrihan, asmallsettlement,islocatednearthesouthwestendoftheisland.AprominentchurchisaboutamilenorthwestofthesouthernextremityofAgrihanIsland.Itwasreportedthattheislandwasvisiblefromadistanceof26miles.Agrihan Island serves as a good radar target from adistanceof31miles.Awesterlycurrentwitha rateof1¼knotswasobservedinAugust,inapositionabout6milesnorthwesterlyofAgrihanIsland.

(337) Anchorage

(338) Anchoragemaybe taken in14fathoms,sandandgravelbottom,about650yardsoffthebeachfrontingthesettlementofAgrihan;however,itisunsafeduringstrongsoutherlyorwesterlywinds,whenthereisaheavyswell.

(339) Asuncion Island(19°40'N.,145°24'E.),lyingabout

55milesnorthofAgrihanIsland,isavolcanicconerisingsteeplytoaheightof2,923feet.Whitesmokeoccasionallyemitsfromthiscone.Onthenortheastandeastsidestherearesomeprominentcrevicesandbrokencliffs,fromthecracksinwhichsmokeemits.Theslopeisgentleatthesouthwestern footof themountain,andcoconutpalmsgrow sparsely amongst dense stunted trees.The southcoastisfrontedbyapebblebeach;theremainingcoastsareprecipitous.


(340) In1955,breakersanddiscoloredwaterwerereportedtoextendabout½mileoffshorefromthenortheastendoftheisland.

(341) AsuncionIslandisreportedtoberadarconspicuousfromadistanceofupto48miles.

(342) In1969,itwasreportedthatAsuncionIslandlay2milesnorthofitschartedposition.

(343) In1953,abankwithadepthof27fathomsoveritwasreportedtolieabout5½milessoutheast,andanotherwithadepthof58fathomsoveritlies16milessouthofAsuncionIsland.

(344) In1945,depthsof52and60fathomswerereportedtolieabout85mileswest-southwestofAsuncionIsland.

(345) Maug Islands(20°01'N.,145°14'E.),lyingabout24milesnorth-northwestofAsuncionIsland,arecomprisedofthreerocky,uninhabitedislandsnamedNorth,EastandWest.Thisgrouphastheappearanceofaconicalvolcanicpeakthathaspartiallycollapsed.North Island,748feethigh,isthehighestbutsmallest.Thisisland,togetherwithEast Island and West Island,formacirclethatenclosesalagoon.ThesteepsidesofEastIslandarecoveredwithgrassandlowbushes,andthehigherslopesarecoveredwithtreesandcoconutpalms.AtowerisonthesummitofEastIsland.In1958,theruinsofwhatappearedtobeafishingstationwere reportedon thenorthendof thesameisland.In1977,MaugIslandwasreportedtobeafairradartargetfromdistancesupto38miles.

(346) Local magnetic anomaly

(347) A localmagnetic anomaly amounting to3°WhasbeenobservednearEastIslandandupto7°nearWestIsland.

(348) Tidalcurrentsseteasterlyacrossthesouthentrance

ofthelagoonatarateof¾knotduringtheflood.Theysetnorththroughtheentranceatarateof¼knotduringtheebb.

(349) Depths-limitations

(350) South Passage, about 600 yards wide and sweptto depths of 59 feet and 48 feet, is the best passageleading into the lagoon.The northeast passage,whichhasbeensweptto15feetoverawidthof150yards,isnotrecommended,asitisfullyexposedtotheprevailingwinds.Thenorthwestpassageisfoul.

(351) Anchorages

(352) In1941,itwasreportedthatsafeanchoragecouldbefound,indepthsof20to40fathoms,abouthalfwaybetweenthewestendofNorthIslandandthesouthwestendofEastIsland,rockbottom.

(353) VesselscananchoroffthenorthernpartofthewestsideofEastIsland.

(354) A vessel reported anchoring in 16 fathoms, blacksandbottom,withthenorthernpointofEastIslandbearing056°.However,thisanchoragewasreportedunsafeduetoswellsrollinginthroughthenortheastpassage.

(355) Supply Reef,withadepthof5fathoms,liesabout10milesnorthwestofNorthIsland.SupplyReefisreportedtobeacircularreefofabout300-yarddiameter,markedbydiscoloredwaterandbybreakingseas.


(357) Farallon de Pajaros (20°32'N., 144°54'E.), lyingabout36milesnorth-northwestofMaugIslands,isthemostnorthernoftheMarianaIslands,anditisanactivevolcano,itssummitformingaregularconeofashes1,047feethigh.

(358) In 1974, a shoal,with a depth of 10 feet over it,wasreported to lie115milesnorthwestofFarallondePajaros.Submarinevolcanicactivityhasbeenreportedinthisvicinity.

(359) FarallondePajaros is reported tobevisible froma distance of 40 miles; at night the crater glow canbeseen for15miles. In1967, itwas reported that thevolcano appeared as a well-defined shadow at nightfromadistanceof27miles.FarallondePajarosisradarconspicuousfromadistanceof29miles.Thenorthern,southernandeasterncoastareprecipitous.Allcoastsarerockyandsteep-to.Thereisnoanchorage.Theislandisbarren,exceptnearthehighrockonthesoutheastside,wherethereissomecoarsegrass.Severalsmallerrocks,oneofwhichisprominent,arelocatedabout150yardssoutheastofthehighrock.

(360) Stingray Shoal, having a depth of 8 fathoms, islocatedinapproximateposition20°30'N.,142°26'E.Theshoalhasnotbeenexaminedandshouldbegivenawideberth.

636 U.S. Coast Pilot 7, Chapter 15 31 MAY 2020 · 31 MAY 2020 637U.S. Coast Pilot 7, Chapter 15 ¢...

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Transcript of 636 U.S. Coast Pilot 7, Chapter 15 31 MAY 2020 · 31 MAY 2020 637U.S. Coast Pilot 7, Chapter 15 ¢...