DEPTH OF WATERWAYS - OF... · DEPTH OF WATERWAYS 18.11.2014 Assoc ... “Ship Stability for Masters...

Dokuz Eylul University Maritime Faculty

NAVIGATION ENGINEERINGDEPTH OF WATERWAYS

18.11.2014

Assoc. Prof. Dr. Selcuk NAS

Recommendations for the Design of the Maritime Configuration of Ports, Approach Channels and Harbour Basins (ROM 3.1-99).

NAVIGATION ENGINEERINGNAVIGATION ENGINEERING

Doç. Dr. Selçuk NAS

DEPTH OF WATER

PIANC Report N° 121. 2014 - Maritime Navigation Commission - Harbour Approach Channels Design Guidelines



DEPTH OF WATER

Yaklaşım kanalı derinliğ hesabı için Ligteringen (2000) formülleri kullanılacak olur ise,

d = D + T + Smax + r + m

d : İhtiyaç duyulan derinlikD : Gemi draftıT : Harita datumun üzerindeki gelgit yüksekliğiSmax : Paralel Batma (Squat) r : dalga nedeniyle düşey hareket Hs/2m : emniyet derinliği

(dip yapısı çamur için 0,3 m, kum için 0,5 m, kaya için 1,0 m.)


DEPTH OF WATER


PIANC 121.2014 ROM 3.1.99


Squat Formulas



Squat Formulas



Squat Formulas


Derrett, D. R. and Barrass C. B. (1999) “Ship Stability for Masters and Mates” Revised by Dr. C. B. Barrass, Fifth Edition.Butterworth‐Heinemann, Oxford.

• Ship on even keel and CB = 0,7 – Ship is squatting with no change of trim

• Ship on even keel and CB > 0,7 – Ship is squatting and trimming to forwardt

• Ship on even keel and CB < 0,7 – Ship is squatting and trimming to aft

• Ship with existing trim to aft – Ship is squatting with trim to aft

• Ship with existing trim to forward – Ship is squatting with trim to forward


Squat With CB


Block coefficient (CB)

Takahashi H., A. Goto and M. Abe (2006) “Study on Standardsfor Main Dimensions of the Design Ship” Technical Note ofNational Institute for Land Infrastructure Management No. 309.

Gaythwaite, J. W. (2004) Design of Marine Facilities for the Berthing, Mooring, and Repair of Vessels


Squat Formulas

PIANC Report N° 121. 2014 - Maritime Navigation Commission - Harbour Approach Channels Design Guidelines Doç. Dr. Selçuk NAS


Doç. Dr. Selçuk NASDerrett, D. R. and Barrass C. B. (1999) “Ship Stability for Masters and Mates” Revised by Dr. C. B. Barrass, Fifth Edition.

Butterworth‐Heinemann, Oxford.

0

0,5

1

1,5

2

2,5

1 3 5 7 9 11 13 15

150 Mt Gemi

200 Mt Gemi

250 Mt Gemi

300 Mt Gemi

350 Mt Gemi

Hız

Squa

tNAVIGATION ENGINEERINGNAVIGATION ENGINEERING

Squat Formulas


HOMEWORK1. Fixed your working group2. Obtain data of your design ship 3. Calculate the max. squat of your design ship for the speeds of

between 5 – 25 Knots using Huuska and Derrett/Barrassformulas.

4. State the particulars of the design ship on the excel sheet5. Prepare the excel sheet for the squat formulas.6. Please draw your graphic for calculated squat and speeds of the

design ship


DEPTH OF WATERWAYS - OF... · DEPTH OF WATERWAYS 18.11.2014 Assoc ... “Ship Stability for Masters...

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