When Meiosis goes wrong… 1.10.12. What can go wrong during meiosis?
What is wrong with Ground Stabilisation.pps
description
Transcript of What is wrong with Ground Stabilisation.pps
![Page 1: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/1.jpg)
What is wrong with Ground Stabilisation?
Captain Peter Starkey
![Page 2: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/2.jpg)
NORWEGIAN DREAM& EVER DECENT
REPORT
To all Bahamian Shipowners:
To determine risk of collision using ARPA vectors, only the relative vectors should be used.
True vectors should be used to determine aspect
![Page 3: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/3.jpg)
NORWEGIAN DREAM& EVER DECENT
REPORTTo all Bahamian Shipowners:
speed input for an anti-collision plot on radar/ARPA should always be:
speed through the water
not speed over the ground
![Page 4: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/4.jpg)
The Relative Plot&
Relative Vector
Independent of input error
“Instant” assessment of risk of collision
CPA
TCPA
![Page 5: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/5.jpg)
The True Plot&
True Vector
“ASPECT”
THE TRUE PICTURE – THE SITUATION
TRIAL MANOEUVRE
![Page 6: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/6.jpg)
ASPECT
The International Regulations for the Prevention of Collisions at Sea
![Page 7: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/7.jpg)
THE TRUE PICTURETHE TRUE SITUATION
Situation Awareness
![Page 8: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/8.jpg)
TRIAL MANOEUVRE
Knowledge of Target Data required to calculate trial manoeuvre
![Page 9: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/9.jpg)
But………
All true functions are dependent on sensor input and sensor accuracy
and are related to the stabilisation
Sea or Ground Stabilisation
Does the choice of stabilisation matter?
![Page 10: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/10.jpg)
ASPECT
Visual aspect - heading
Radar aspect
sea stabilised - approximate visual aspect
ground stabilised - may be very different
![Page 11: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/11.jpg)
Does radar aspect matter?
Clear visibility - look out of the window!!
Restricted visibility - vessels not in sight
Rule 19
What is aspect in Rule 19?
![Page 12: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/12.jpg)
Relative Vector
Own Ship
RELATIVE VECTORS SEA OR GROUND STABILISED
Heading
Target
Current
![Page 13: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/13.jpg)
Heading – Visual AspectTrue Vector – Radar Aspect
Current
Own Ship
Heading - True Vector
Target
SEA STABILISEDTRUE VECTORS
![Page 14: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/14.jpg)
True Vector – Radar Aspect
Current
Own Ship
GROUND STABILISEDTRUE VECTORS
Heading
Target
![Page 15: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/15.jpg)
True Vector – Radar Aspect
Own Ship
GROUND STABILISEDTRUE VECTORS
Heading
Target
![Page 16: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/16.jpg)
The Practical Effect
![Page 17: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/17.jpg)
Current
Own Ship
Heading
CHANNEL
Slow speed target
GROUND STABILISEDTRUE VECTORS
![Page 18: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/18.jpg)
Current
Own Ship
CHANNEL
Slow speed target
RELATIVE VECTORS SEA OR GROUND STABILISED
Heading m
arker
![Page 19: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/19.jpg)
Current
Own Ship
Heading
CHANNELSlow speed target
SEA STABILISEDTRUE VECTORS
![Page 20: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/20.jpg)
Current
Own Ship
CHANNEL
Slow speed target
GROUND STABILISEDTRUE VECTORS
![Page 21: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/21.jpg)
Current
Own Ship
Heading
CHANNEL
Slow speed target
SEA STABILISEDTRUE VECTORS
![Page 22: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/22.jpg)
COLLISION AVOIDANCE
SEA OR GROUND
RELATIVE OR TRUE
![Page 23: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/23.jpg)
SEA STABILISEDTRUE VECTORS
CURRENT
TARGET
OWN SHIP
![Page 24: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/24.jpg)
SEA STABILISEDTRUE VECTORS
CURRENT
TARGET
OWN SHIP
![Page 25: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/25.jpg)
RELATIVE VECTORS
CURRENT
TARGET
OWN SHIP
Heading marker
![Page 26: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/26.jpg)
GROUND STABILISEDTRUE VECTORS
CURRENT
TARGET
OWN SHIP
![Page 27: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/27.jpg)
Own Ship
RELATIVE VECTORS
North Up
RM (TT)
Ground Stabilised (GPS)
Heading 350°
CMG (GPS) 355°
Channel 355°/175°
HL
Current 090° 2 kts
![Page 28: What is wrong with Ground Stabilisation.pps](https://reader034.fdocuments.us/reader034/viewer/2022042623/545e6e17b1af9f512e8b4b44/html5/thumbnails/28.jpg)
Own Ship
TRUE VECTORS
North Up
RM (TT)
Ground Stabilised (GPS)
Heading 350°
CMG (GPS) 355°
Channel 355°/175°
HL
Current 090° 2 kts