Under the Inland Navigation Rules, when a power-driven vessel is leaving a dock or berth, she shall sound which signal?

A. Two short blasts
B. Three short blasts
✓ One prolonged blastCorrect
D. One short blast

Why C is correct

33 CFR §83.34(g) requires a power-driven vessel leaving a dock or berth to sound one prolonged blast. This is distinct from the maneuvering signals prescribed in §83.34(a).

Cited:33 CFR §83.34

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