Question 35 MODU02 - Barge Supervisor

The Correct Answer is A **Why option A ("one prolonged blast") is correct:** According to the Inland Navigational Rules (specifically Rule 34(d)), a power-driven vessel leaving a dock or berth is required to sound a signal of **one prolonged blast** (a prolonged blast is a blast of four to six seconds duration). This maneuver is considered a warning signal to alert other vessels navigating in the area of its departure and potential entry into the channel. **Why the other options are incorrect:** * **B) four short blasts:** Four short blasts is a signal typically used under the International Rules (COLREGs) to indicate uncertainty or disagreement, or under Inland Rules, as part of specific maneuvering signals (like five or more short blasts to indicate danger or doubt), but not specifically for leaving a dock. * **C) one long blast:** While the duration of a "prolonged blast" (four to six seconds) might sometimes be colloquially referred to as "long," the specific legal terminology used in the Inland Rules is "prolonged blast." In practice, "one long blast" is often used synonymously with "one prolonged blast" in conversation, but "prolonged" is the exact term. However, compared to option A (one prolonged blast), C is usually avoided as A is the precise terminology defined in the rules. Since A is offered, A is the superior answer. * **D) no signal is required:** This is incorrect. The rules explicitly mandate a signal (one prolonged blast) for this maneuver to ensure safety and provide adequate warning to other traffic.