Question 35 GLI07 - OUPV

The Correct Answer is A **Why Option A ("one prolonged blast") is correct:** The Inland Navigational Rules (specifically Rule 34(d)) govern whistle signals in inland waters. This rule states that when a power-driven vessel is leaving a dock or berth, it is required to sound **one prolonged blast** (a prolonged blast is defined as a blast of from four to six seconds duration). This signal is intended to notify other vessels in the vicinity of the vessel's intention to get underway. **Why the other options are incorrect:** * **B) four short blasts:** A sequence of four short blasts is not the specified signal for leaving a dock or berth. Four short blasts (if they were rapid) often relate to distress, or more commonly, five or more short blasts are used to indicate doubt or danger (the "danger signal"). * **C) one long blast:** The term "long blast" is not the standard terminology used in the Rules; the proper term is "prolonged blast" (4 to 6 seconds). While semantically similar, the precise term required by the Rules for this action is "prolonged blast." In common usage, "one long blast" often refers to the maneuver signal required when meeting a bend or obstruction (Inland Rule 34(e)), but the specific required signal for leaving a berth is one *prolonged* blast. * **D) no signal is required:** This is incorrect. Inland Rule 34(d) mandates that a signal must be given when leaving a dock or berth to warn approaching traffic.