Question 966 Rules of the Road

The correct answer is A) More than 100 meters in length, at anchor. The rapid ringing of a bell for five seconds followed by the sounding of a gong for five seconds indicates that the vessel is more than 100 meters in length and is at anchor, as per the International Regulations for Preventing Collisions at Sea (COLREGS). This signal is used to identify large vessels at anchor in order to alert other vessels to their presence and avoid collisions. The other answer choices are incorrect because they do not match the signaling pattern described in the question. Fishing vessels making no way through the water would not use this signal, nor would a vessel that is aground. Fishing vessels in company with another vessel would use a different sound signal.