Question 3915 Deck General

The correct answer is C) towed-under buoy. A V-shaped ripple with the point of the V pointing upstream in a river is a visual indication that there is a towed-under buoy in that location. Towed-under buoys are used to mark underwater obstructions or hazards, and the V-shaped ripple pattern is a characteristic sign that the buoy is being pulled underwater by the current rather than floating on the surface. The other options (A and B) are incorrect because submerged rocks or sunken wrecks would not produce this distinctive V-shaped ripple pattern. The ripple is specifically indicative of a towed-under buoy marking a hazard or obstruction in the waterway.