Maritime English
Maneuvering

What is Tactical Diameter Evaluation?

Tactical Diameter Evaluation Assessment of the vessel’s maximum transverse distance travelled during a turning circle with constant rudder angle at full speed.

Source: IMO SMCP, STCW Convention, SOLAS, COLREG

How is “Tactical Diameter Evaluation” Used in Practice?

Pilot: Vessel’s tactical diameter evaluation indicates 550 metres; commence turn six cables early to clear breakwater end.

Certification Exam Relevance

STCWMarlins TestISF WatchkeeperGMDSS

Who Needs to Know This Term?

  • Deck Officers
  • Engine Officers
  • Masters

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Frequently Asked Questions

What is Tactical Diameter Evaluation?

Assessment of the vessel’s maximum transverse distance travelled during a turning circle with constant rudder angle at full speed.

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