Question 35 FCP01 - First Class Pilot

The Correct Answer is A **Explanation for Option A (one prolonged blast):** According to the U.S. Inland Navigational Rules (specifically Rule 34(d)), a power-driven vessel intending to leave a dock or berth is required to sound **one prolonged blast** (a prolonged blast is defined as a blast lasting 4 to 6 seconds). This signal is necessary to warn other vessels in the immediate vicinity or in a narrow channel or fairway of the vessel's intention to get underway. **Why the Other Options are Incorrect:** * **B) four short blasts:** Four short blasts is a signal typically used to indicate a vessel is not under command or is constrained by its draft, or as part of danger/emergency signaling. It is not the prescribed signal for leaving a dock or berth. * **C) one long blast:** While the term "long blast" is sometimes used colloquially, the official terminology in the Rules is a "prolonged blast" (4-6 seconds). Furthermore, in many contexts, "one long blast" is the prescribed signal for vessels operating in conditions of restricted visibility (fog signals) or for certain maneuvering signals on the Great Lakes, but not for leaving a dock under normal circumstances under standard Inland Rules. The correct term and signal is **prolonged**. * **D) no signal is required:** This is incorrect. The Inland Rules explicitly mandate a signal (one prolonged blast) for a vessel leaving a dock or berth to ensure safety and awareness for other traffic.