USCG Exam PracticeRule 34 — Maneuvering and Warning Signals
Under the Inland Navigation Rules, three short blasts on the whistle by a power-driven vessel indicates which of the following?
- A. I intend to leave you on my starboard side
- B. I am in doubt about your intentions
- ✓ I am operating astern propulsionCorrect
- D. I intend to overtake you on your port side
Why C is correct
Inland Rule 34(a)(i)(3) specifies that three short blasts mean 'I am operating astern propulsion.' This signal describes the propulsion action being taken, not a passing intention.
Cited:33 CFR §83.34(a)(i)(3)