Question 610 Rules of the Road

The correct answer is A) she shall turn off her sidelights when not making way. According to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel restricted in her ability to maneuver is required to display all-round red and green sidelights when underway, but when not making way, she shall turn off her sidelights and display a stern light, a masthead light, and a red and white all-round flashing light or shape of two diamonds in a vertical line. This requirement helps other vessels identify the restricted vessel's status and maneuver accordingly. The other answer choices are incorrect because: B) vessels engaged in fishing have the right-of-way over vessels restricted in their ability to maneuver, C) the whistle signal for a vessel restricted in her ability to maneuver is one prolonged blast followed by two short blasts, and D) the shape of two diamonds in a vertical line is used to indicate a vessel restricted in her ability to maneuver when not making way, not while underway.