Question 35 GLI01 - Master-Unlimited Tonnage

The Correct Answer is A **Explanation for A (one prolonged blast) being correct:** According to the U.S. Inland Rules of Navigation (specifically Rule 34(d)), when a power-driven vessel is leaving a dock or berth, it is required to sound a signal of **one prolonged blast**. This signal serves as a warning to other vessels approaching the area or those that may be obscured by structures, indicating that the vessel is underway and leaving its fixed position. **Explanation of why other options are incorrect:** * **B) four short blasts:** A sequence of four short blasts is not a standard signal designated for a vessel leaving a dock or berth. Short blasts (approximately 1 second duration) are primarily used for danger warnings (five or more short blasts) or maneuvering signals (one, two, or three short blasts) when vessels are in sight of one another. * **C) one long blast:** While Rule 32 defines a prolonged blast as being 4 to 6 seconds in duration, the term "long blast" is not the standard term used in the rules to define the required signal. The required term is "one prolonged blast." More importantly, a single long blast (if interpreted as a duration outside the 4-6 second range) is often associated with the warning signal sounded by vessels approaching a bend or obstruction (Rule 34(e)), not specifically leaving a dock. Even if "long" and "prolonged" were considered interchangeable in casual speech, "prolonged" is the accurate, codified term. * **D) no signal is required:** This is incorrect. A signal *is* required by Rule 34(d) to ensure safety and provide adequate warning to nearby traffic when a vessel is emerging from a position where its view or movements might be restricted.