USCG Exam PracticeRule 9 — Narrow Channels
A vessel intends to cross a narrow channel. Under the Inland Navigation Rules, under what condition is this crossing prohibited?
- A. Whenever a vessel of less than 20 meters is present in the channel
- ✓ Whenever the crossing would impede the passage of a vessel that can safely navigate only within the channelCorrect
- C. Whenever visibility is restricted by fog or mist
- D. Whenever the crossing vessel is a sailing vessel
Why B is correct
33 CFR §83.09(d) states that a vessel must not cross a narrow channel or fairway if such crossing impedes the passage of a vessel which can safely navigate only within that channel or fairway. The restriction is specifically tied to impeding a vessel constrained to the channel, not to vessel type or visibility conditions.
Cited:33 CFR §83.09