USCG Exam Practice · Single-screw maneuvering and prop walk
Under 33 CFR §164.11, which of the following is expressly prohibited when fixing a vessel's position underway on navigable waters of the United States?
- AUsing electronic navigational equipment as one of multiple position-fixing references
- BUsing buoys as the sole means of fixing the vessel's position✓ correct
- CUsing hydrographic contours in conjunction with radar to fix position
- DUsing geographic reference points visible from the wheelhouse
Why B is correct
33 CFR §164.11(e) expressly states that buoys alone are not to be used to fix the vessel's position. The accompanying note explains that buoys are placed in approximate positions and may be displaced by currents, ice, or vessel collisions. Options A, C, and D are all affirmatively required or permitted by §164.11(d).
Cited:33 CFR §164.11
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