Question 42

The Correct Answer is C ### Explanation for C (3 short blasts) Option C, **3 short blasts**, is correct because it is the required maneuver signal indicating "I am operating astern propulsion." Under the **Inland** Navigation Rules (specifically Rule 34(a)(i)), when vessels are in sight of one another and a power-driven vessel is maneuvering, it must signal its intent. When a vessel is **backing out of a berth**, it must engage astern propulsion. The signal for astern propulsion is **three short blasts**. This signal must be given **in addition** to the prolonged blast required under Rule 34(d) (which signals the vessel is leaving the dock/berth) when another vessel is in sight. ### Why the Other Options are Incorrect **A) 1 blast:** This signal means "I intend to leave you on my port side" (Inland Rule 34(a)(i)). It is a passing signal used when maneuvering in a narrow channel or during an overtaking situation, not for indicating astern propulsion when backing out of a berth. **B) 2 short blasts:** This signal means "I intend to leave you on my starboard side" (Inland Rule 34(a)(i)). Like one short blast, this is a passing/maneuvering signal used for lateral movements, not for indicating that the vessel is using astern propulsion (backing up). **D) no additional signal:** This is incorrect. While the vessel must give one **prolonged blast** (Rule 34(d)) to indicate it is leaving the berth, the question asks for the signal **in addition to** the prolonged blast, specifically for the act of **backing out**. Since the vessel is using astern propulsion while maneuvering with another vessel in sight, the astern signal (3 short blasts) is mandatory.