Question 17 RVR03 - Mate of LT 500-1600 GRT

The Correct Answer is A. **Explanation for A (Correct Answer):** Option A, "A vessel that you can see from the bridge," is correct because the phrase "in sight" (or "in sight of one another") as defined and used in the International Regulations for Preventing Collisions at Sea (COLREGs), refers exclusively to visibility by eye. A vessel is considered "in sight" when it can be visually observed, making the rules governing vessels in sight (such as Rules 12-19 regarding sailing vessels, overtaking, crossing, and head-on situations) applicable. In a situation involving fog (restricted visibility), the COLREGs specifically shift to Rule 19 ("Conduct of Vessels in Restricted Visibility"), which applies when vessels are **not** in sight of one another. As soon as you can visually see the vessel, you move out of the restricted visibility rules (Rule 19) and back into the normal rules of Parts B and A. **Explanation of Why Other Options Are Incorrect:** * **B) A radar target of which you have determined the course and speed:** While radar is a crucial tool for determining risk of collision and taking appropriate action in restricted visibility (Rule 19), a vessel detected only by radar is explicitly **not** considered "in sight." Radar targets fall under the conditions of restricted visibility where visual contact is not yet established. * **C) A vessel from which you can hear the fog signal:** Hearing a fog signal indicates that the vessel is nearby, likely in restricted visibility, and is transmitting the appropriate audible warning (Rule 35). However, hearing a signal does not constitute visual sighting. The rules of Rule 19 remain in effect until the vessel is visually confirmed. * **D) All of the above:** Since options B and C do not meet the legal definition of "in sight" (visual observation), this option is incorrect.