USCG Exam Practice · GPS and electronic navigation
According to 33 CFR §164.11, which of the following is specifically prohibited when fixing a vessel's position underway?
- AUsing electronic navigational equipment as the sole means of fixing position
- BUsing buoys alone to fix the vessel's position✓ correct
- CUsing geographic reference points without corroborating radar
- DUsing hydrographic contours without a depth sounder
Why B is correct
33 CFR §164.11(e) explicitly 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 moved by currents, ice, or vessel collisions, making them unreliable as sole position references.
Cited:33 CFR §164.11
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