What is Turning Circle Diameter?
Turning Circle Diameter The distance perpendicular to the original track between tangents of the vessel’s path when executing a steady-turn at a given rudder angle and speed, usually expressed in ship lengths or cables.
Source: IMO SMCP, STCW Convention, SOLAS, COLREG
How is “Turning Circle Diameter” Used in Practice?
Helmsman: Note turning circle diameter on the pilot card is eight cables; ensure no traffic is inside that radius before commencing emergency turn to port.
Certification Exam Relevance
Who Needs to Know This Term?
- Deck Officers
- Engine Officers
- Masters
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What is Turning Circle Diameter?
The distance perpendicular to the original track between tangents of the vessel’s path when executing a steady-turn at a given rudder angle and speed, usually expressed in ship lengths or cables.
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