Question 695 Rules of the Road

The correct answer is C) Three black balls. According to the International and Inland Navigation Rules, a vessel aground during daylight must display three black balls in a vertical line. This signal indicates to other vessels in the area that the aground vessel is restricted in its ability to maneuver and may require assistance. The other answer choices are incorrect because they do not match the standard signaling requirements for a vessel aground. One, two, or four black balls would not be the proper daylight signal to convey the vessel's status and need for assistance.