USCG Exam PracticeRule 9 — Narrow Channels
A vessel intends to cross a narrow channel. Under the Inland Navigation Rules, which condition would make this crossing prohibited?
- A. The crossing vessel is less than 20 meters in length.
- ✓ The crossing impedes the passage of a vessel that can safely navigate only within the channel.Correct
- C. The crossing vessel is a sailing vessel proceeding under sail alone.
- D. The channel vessel has not yet initiated maneuvering signals under Rule 34.
Why B is correct
Inland Rule 9(d) prohibits a vessel from crossing a narrow channel or fairway if such crossing impedes the passage of a vessel which can safely navigate only within that channel. The channel-constrained vessel must use the Rule 34(d) signal if in doubt as to the crossing vessel's intentions.
Cited:33 CFR §83.09(d)