INLAND ONLY What signal is a power-driven vessel, when leaving a dock or berth, required to sound?

Correct Answer: Option D — one prolonged blast

33 CFR 83.34(g) requires a power-driven vessel leaving a dock or berth to sound one prolonged blast. This signal serves as a warning to other vessels in the vicinity that the vessel is underway and maneuvering, ensuring awareness of its departure from a stationary position.