Question 16 AB01 - Able Seafarer

The Correct Answer is C **Explanation for Option C (Correct):** Option C, "Station a look-out as low down and far forward as possible," is correct because it reflects the requirement under both International and Inland Rules (Rule 5 – Look-out). A proper look-out must be maintained at all times by sight and hearing. In restricted visibility (like thick fog), placing the look-out forward and low down enhances the ability to hear faint fog signals or wave noises from approaching vessels, and to detect visual targets as they emerge from the fog bank as quickly as possible. Maintaining a dedicated look-out independent of the radar operator is essential for safety. **Explanation of Incorrect Options:** * **A) Station the look-out in the wheelhouse to keep a continuous watch on the radar:** While a radar watch is essential, the look-out required by Rule 5 must use all available means, including sight and hearing. Placing the primary look-out solely within the enclosed wheelhouse diminishes their ability to hear fog signals or other auditory cues outside the vessel, which is critical in thick fog. * **B) Secure the sounding of fog signals until a vessel closes within five miles:** This action is a severe violation of the Rules (Rule 35). In restricted visibility, the vessel *must* continuously sound appropriate fog signals at mandatory intervals (usually every two minutes for a power-driven vessel making way, or every two minutes for vessels stopped). Securing the signals compromises the safety of all vessels in the area. * **D) Keep the radar on the shortest available range for early detection of approaching vessels:** While monitoring short range is important for immediate collision avoidance, Rule 7(b) specifically states that radar should be used on *appropriate ranges*. To achieve "early detection," the radar must be used on longer ranges initially to detect distant targets and plot their movement, shifting to shorter ranges only for close-quarters situations. Relying only on the shortest range prevents the vessel from detecting and evaluating potential threats far enough ahead of time.