Question 14

The Correct Answer is D **Why option D ("one prolonged blast") is correct:** According to the Inland Navigational Rules (specifically Rule 34 - Maneuvering and Warning Signals), a power-driven vessel operating in inland waters, when leaving a dock or berth, is required to sound one prolonged blast. This signal serves as a warning of the vessel's approach and that it is underway, indicating that the vessel is leaving its position and is moving out into a channel or waterway where it may be a risk of collision with other traffic. **Why the other options are incorrect:** * **A) one long blast:** While Rule 34 uses the term "prolonged blast" (which is defined as a blast of 4 to 6 seconds), "long blast" is not the standard or official terminology used in the U.S. Inland Rules for this specific signal, making it less precise or potentially ambiguous. * **B) no signal is required:** This is incorrect. A signal is explicitly required by the Inland Rules when leaving a dock or berth to warn other vessels of the maneuver. * **C) four short blasts:** Four short blasts is not a required warning signal for leaving a dock or berth. A signal of four or more short blasts is generally used to indicate "doubt" or "danger" (the danger signal), or specifically four short blasts are used as the fishing signal in certain situations.