USCG Exam PracticeRule 34 — Maneuvering and Warning Signals
Under the Inland Navigation Rules, a vessel has a second whistle fitted more than 100 meters from the first. When giving maneuvering and warning signals, which of the following applies?
- A. Both whistles shall be sounded simultaneously to increase audibility
- ✓ Only one whistle shall be used for giving maneuvering and warning signalsCorrect
- C. The forward whistle shall be used for maneuvering signals and the after whistle for warning signals
- D. Either whistle may be used at the master's discretion, provided both are operational
Why B is correct
33 CFR §83.34(f) states that if whistles are fitted on a vessel at a distance apart of more than 100 meters, one whistle only shall be used for giving maneuvering and warning signals. This prevents the acoustic confusion that could result from two widely separated sound sources.
Cited:33 CFR §83.34(f)