Question 968 Rules of the Road

The correct answer is C) A vessel aground may sound a whistle signal. According to the navigation rules, a vessel aground is required to sound the appropriate fog signal, which is a rapid ringing of a bell or a whistle signal. This is to indicate the vessel's position and warn other vessels in the vicinity. The other answer choices are incorrect: A) A vessel not under command does not sound the same fog signal as a vessel towed. B) The fog signal intervals for sailing vessels may vary depending on the vessel's size and length. D) Pilot vessels may sound additional fog signals, such as the identity signal, in addition to the standard fog signal.