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USCG Exam Practice · Compass variation and deviation; T-V-M-D-C

Under 33 CFR §164.78, a person directing and controlling the movement of a towing vessel is required to know and apply variation and deviation under which condition?

  1. AAt all times, regardless of the type of compass fitted
  2. BOnly when operating seaward of the territorial sea baseline
  3. CWhere a magnetic compass is fitted and charts have enough detail to enable this correction✓ correct
  4. DOnly when the gyrocompass is inoperative

Why C is correct

33 CFR §164.78(a)(5) states the operator must know and apply variation and deviation where a magnetic compass is fitted and where charts or maps have enough detail to enable this type of correction. The regulation does not limit this requirement to offshore operations or gyrocompass failure.

Cited:33 CFR §164.78

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Under 33 CFR §164.78, a person directing and controlling the moveme… — USCG Exam Practice · CaptainsGround