Question 35 OSV02 - Mate - Offshore Supply Vessels

The Correct Answer is A **Explanation for A (one prolonged blast):** The Inland Navigation Rules (Rule 34(d)) specifically address the situation of a power-driven vessel leaving a dock or berth. It mandates that a vessel restricted in its ability to maneuver due to leaving a dock or berth shall sound **one prolonged blast**. This signal is intended to notify other vessels in the vicinity of its presence and intention to move out into the channel or waterway. **Explanation for Incorrect Options:** * **B) four short blasts:** Four short blasts is not a recognized signal for a vessel leaving a dock or berth under the Inland Rules. A series of short blasts (typically five or more) is generally used as a danger signal. * **C) one long blast:** While "long blast" and "prolonged blast" are sometimes used interchangeably in casual language, the precise regulatory terminology used in the U.S. Inland Rules is "prolonged blast" (a blast of 4 to 6 seconds). However, regardless of the term, the key difference is that a single prolonged blast is the *correct* signal. This option is essentially a slightly ambiguous phrasing of the correct answer but in a multiple-choice context, A uses the precise term required by the Rule. * **D) no signal is required:** This is incorrect. Rule 34(d) makes the sounding of the prolonged blast mandatory for notification when leaving a dock or berth.