Question 17 RVR02 - Master of LT 500-1600 GRT

The Correct Answer is A. **Explanation of Option A (Correct):** In maritime regulations, specifically the International Regulations for Preventing Collisions at Sea (COLREGs), the term "in sight" (or "sight") is consistently used to refer to vessels that are **visually observable**. Rule 19 (Conduct of Vessels in Restricted Visibility) governs vessels navigating in fog. However, as soon as a vessel becomes **visually detectable** (i.e., you can see it from the bridge), you immediately transition out of the pure restricted visibility rules and begin to apply the rules governing vessels in sight of one another (Rules 11 through 18). For example, the rules regarding determining risk of collision (Rule 7) and actions to avoid collision (Rule 8) become applicable based on the visual assessment once the vessel is "in sight." A vessel is "in sight" when you can actually see it with your eyes. **Explanation of Other Options (Incorrect):** * **B) A radar target of which you have determined the course and speed:** While determining course and speed via radar (known as plotting) is required under Rule 19, a vessel that is only a radar target is explicitly **not** "in sight." Radar targets are indicative of "restricted visibility," and you must continue to follow Rule 19 until the vessel becomes visually observable. * **C) A vessel from which you can hear the fog signal:** Hearing a fog signal is an indication that another vessel is near in restricted visibility (Rule 35), but it does not mean the vessel is "in sight." You can often hear a fog signal long before the vessel becomes visually apparent. Hearing the sound means you must take action under Rule 19(e) (reducing speed, navigating with caution) but does not allow you to transition to the rules for vessels in sight of one another. * **D) All of the above:** Since B and C do not meet the definition of "in sight" (which strictly means visual sighting), this option is incorrect.