Question 878 Rules of the Road

The correct answer is C) Any means of making an efficient sound signal. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, vessels 10 meters or more in length are required to have "any efficient sound signal device" on board. This means the vessel must have some type of equipment that can produce an audible sound signal, such as a whistle, horn, or other device. The regulations do not specify a particular type of sound signaling equipment, as long as it can effectively produce an audible sound signal. The other options are incorrect because A) a whistle only is not sufficient, B) a bell only does not meet the requirement for any efficient sound signal device, and D) a bell and a whistle, while acceptable, are not the minimum required.