Question 15 RVR01 - Master of Unlimited Tonnage

The Correct Answer is A **Explanation for A (A seaplane):** Rule 18 (Responsibilities between vessels) of both the International Regulations for Preventing Collisions at Sea (COLREGs) and the Inland Rules establishes a hierarchy of precedence. Seaplanes on the water are treated as power-driven vessels for the purpose of these Rules (Rule 3(j)). However, Rule 18 specifically addresses the hierarchy *between* vessels, and Rule 18(d) states that "a seaplane on the water shall, in general, keep clear of all vessels and avoid impeding their navigation." Therefore, a seaplane is specifically required to keep clear of and not impede the navigation of a power-driven vessel. **Explanation for why other options are incorrect:** * **B) A sailing vessel:** According to Rule 18(a)(ii), a power-driven vessel must keep out of the way of a sailing vessel. A sailing vessel is generally a "stand-on" vessel relative to a power-driven vessel and is not required to keep clear. * **C) A vessel not under command:** According to Rule 18(a)(i), a power-driven vessel must keep out of the way of a vessel not under command (NUC). An NUC vessel has the highest right-of-way among those listed (excluding vessels restricted in their ability to maneuver) and should not be impeded by a power-driven vessel. * **D) A vessel engaged in fishing:** According to Rule 18(a)(iii), a power-driven vessel must keep out of the way of a vessel engaged in fishing when fishing restricts maneuverability. Therefore, a vessel engaged in fishing is a "stand-on" vessel relative to a power-driven vessel and is not required to keep clear.