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 the sole means of fixing position
- BUsing buoys as the sole means of fixing position✓ correct
- CUsing geographic reference points to corroborate a fix
- DUsing hydrographic contours in conjunction with other aids
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 collisions. Electronic equipment, geographic reference points, and hydrographic contours are all listed in §164.11(d) as acceptable inputs to a position fix.
Cited:33 CFR §164.11
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