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

Under 33 CFR §164.78(a)(5), when is a person directing a towing vessel required to know and apply variation and deviation?

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

Why C is correct

33 CFR §164.78(a)(5) states the requirement applies '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 to offshore operations or gyrocompass failure.

Cited:33 CFR §164.78

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Under 33 CFR §164.78(a)(5), when is a person directing a towing ves… — USCG Exam Practice · CaptainsGround