USCG Exam Practice · Rule 34 — Maneuvering and Warning Signals
Under the Inland Navigation Rules, three short blasts on the whistle by a power-driven vessel indicate which of the following?
- AI intend to leave you on my port side
- BI intend to leave you on my starboard side
- CI am operating astern propulsion✓ correct
- DI am in doubt about your intentions
Why C is correct
33 CFR §83.34(a)(i)(3) specifies that three short blasts mean 'I am operating astern propulsion.' This signal applies in meeting and crossing situations when power-driven vessels are in sight of one another within half a mile.
Cited:33 CFR §83.34(a)(i)(3)
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