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旋回円直径とは?

旋回円直径 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 “旋回円直径” Used in Practice?

操舵手: パイロットカードの旋回円直径は8ケーブル。左舷緊急旋回を始める前にその半径内に船がないことを確認せよ。

Certification Exam Relevance

STCWMarlins TestISF WatchkeeperGMDSS

Who Needs to Know This Term?

  • Deck Officers
  • Engine Officers
  • Masters

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Frequently Asked Questions

旋回円直径とは?

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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