Question 17 RVR04 - Master or Mate of LT 200 GRT

The Correct Answer is A **Explanation for Option A (Correct):** Option A, "A vessel that you can see from the bridge," is correct because the term "in sight" (or "in sight of one another") is a specific technical term used in the nautical Rules of the Road (COLREGs/Inland Rules). A vessel is considered "in sight" only when she is visually observable from the other vessel. When vessels are "in sight," the rules governing Restricted Visibility (Rule 19) no longer apply, and the rules governing Conduct of Vessels in Sight of One Another (Rules 4 through 10, specifically crossing, overtaking, and head-on situations) immediately take effect. Visual observation is the fundamental trigger for this shift in applicable rules. **Explanation for Other Options (Incorrect):** * **B) A radar target of which you have determined the course and speed:** While radar provides crucial information for avoiding collision in restricted visibility (Rule 19), a vessel detected only by radar is explicitly **not** considered "in sight." Until visual contact is made, the vessels are operating under Rule 19 (Restricted Visibility), which requires specific actions like proceeding at a safe speed and sound signaling. * **C) A vessel from which you can hear the fog signal:** Hearing a fog signal indicates the presence and general direction of another vessel in restricted visibility, but it does not mean the vessel is "in sight." Like radar, this situation falls under Rule 19. If the vessel were "in sight," it would not be sounding the fog signal (unless required by another rule, like when maneuvering in a narrow channel), and the standard maneuvering rules (Rules 13-15) would apply immediately. * **D) All of the above:** Since options B and C describe situations where visibility is restricted and the vessels are not yet "in sight" (Rule 19 applies), this option is incorrect.