USCG Exam PracticeEstimated position from current set & drift
Per 33 CFR §164.78, a person directing a towing vessel must know and apply variation and deviation under which specific condition?
- A. At all times, regardless of the type of compass installed
- B. Only when transiting waters where tidal currents exceed 2 knots
- ✓ Where a magnetic compass is fitted and where charts or maps have enough detail to enable this type of correctionCorrect
- D. Only when the vessel is operating beyond three nautical miles offshore
Why C is correct
33 CFR §164.78(a)(5) specifies that the person directing a towing vessel 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 requirement is conditional on both the equipment and chart detail.
Cited:33 CFR §164.78