Question 669 Rules of the Road

The correct answer is D) A sailing vessel. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a "vessel restricted in her ability to maneuver" is defined as a vessel that, from the nature of her work, is restricted in her ability to deviate from her course. This includes vessels engaged in dredging, mineclearing, and servicing navigation markers, as described in options A, B, and C. However, a sailing vessel is not considered "restricted in her ability to maneuver" under the rules, as it is able to change course and direction as needed. Therefore, option D is the correct answer.