Question 921 Rules of the Road

The correct answer is D) Sailing vessel at anchor. According to the International Regulations for Preventing Collisions at Sea (COLREGS), a sailing vessel at anchor is required to sound a fog signal with a bell. This is specified in Rule 35(g) of the COLREGS, which states that a vessel at anchor shall ring the bell rapidly for about 5 seconds at intervals of not more than 1 minute. The other options are incorrect because: A) Vessels engaged in fishing are not specifically required to sound a fog signal with a bell, B) Power-driven vessels underway are required to sound a fog signal with a whistle, not a bell, and C) Vessels not under command are required to sound a fog signal with a gong, not a bell.