Question 896 Rules of the Road

The correct answer is D) All of the above. According to the Navigation Rules, both International and Inland, any vessel may sound the danger signal, which is five or more short and rapid blasts on the whistle, to indicate doubt about the actions or intentions of another vessel. This applies regardless of the vessel's role in a crossing situation (stand-on or give-way), and even if the vessel is at anchor. The danger signal is used to draw attention to a potentially dangerous situation and warn the other vessel(s) involved. The other options are incorrect because they limit the application of the danger signal to specific vessel roles or situations, when in fact the Rules allow any vessel to sound this signal as needed to enhance navigational safety.