Deck General USCG Question #5013 (Set 155)

The distance a vessel moves at right angles to the original course, when a turn of 180° has been completed, is called the __________.

Official USCG Answer & Rule Citation

Correct Answer: Option A — tactical diameter

Tactical diameter is the perpendicular distance between the original course line and the course line after completing a 180-degree turn. It is a critical turning characteristic defined in ship maneuvering data trials.

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