Question 35

The Correct Answer is A **Explanation for A (one prolonged blast):** The Inland Navigational Rules (33 CFR Subchapter E), specifically Rule 34(g), address the signal required for a power-driven vessel when leaving a dock or berth. Rule 34(g) states: "When a power-driven vessel is leaving a dock or berth, she shall sound **one prolonged blast**." This signal is intended to alert other vessels to her presence and intention to maneuver into the channel or fairway. **Why other options are incorrect:** * **B) four short blasts:** This signal is not the required sound signal for leaving a dock or berth. Four short blasts are sometimes used in specific situations (like a vessel requiring assistance or in certain fishing vessel operations), but not for the standard maneuver of leaving a berth. * **C) one long blast:** While "prolonged" and "long" are often used interchangeably in common speech, the Inland Rules specifically define the required signal as "one **prolonged** blast." A prolonged blast is defined as a blast of duration from 4 to 6 seconds. The term "long blast" is not the precise terminology used for this required maneuver under Rule 34(g). * **D) no signal is required:** This is incorrect. Rule 34(g) mandates the sounding of one prolonged blast to ensure safety and awareness when entering the navigable channel from a fixed location.