Question 652 Rules of the Road

The correct answer is C) there is an obstruction on the port side of the dredge. The two vertical balls on the port side of the dredge indicate the presence of an obstruction on that side, which vessels should avoid. This is in accordance with the International Rules of the Road (COLREGS) and the Inland Navigation Rules, which specify that these shapes signify the presence of an obstruction. The other answer choices are incorrect because A) the dredge may or may not be moored, B) you should not pass on the port side due to the obstruction, and D) the dredge is not necessarily not under command, it may simply have an obstruction on its port side.