Question 35

The Correct Answer is A **Why Option A ("one prolonged blast") is correct:** The Inland Navigational Rules (specifically Rule 34(g)) govern whistle signals in U.S. inland waters. Rule 34(g) states that a power-driven vessel intending to leave a dock or berth must give a signal of **one prolonged blast**. This signal serves to alert other vessels of the intent to maneuver into the channel or fairway. **Why the other options are incorrect:** * **Option B (four short blasts):** Four short blasts is the danger signal, used when the operator is in doubt as to the intent of the other vessel or when the operator believes a danger of collision exists. It is not the required signal for leaving a dock or berth. * **Option C (one long blast):** While "long" and "prolonged" are often used interchangeably in common speech, maritime rules define a **prolonged blast** as a blast lasting from 4 to 6 seconds (Rule 32). A prolonged blast is the correct terminology and defined duration for the required maneuver signal, making Option A the precise and correct regulatory answer. * **Option D (no signal is required):** A signal **is** required by the Inland Rules (Rule 34(g)) to ensure safe navigation and inform other vessels of the maneuvering vessel's intentions.