Question 884 Rules of the Road

The correct answer is D) All of the above. Both international and inland navigation rules allow for the danger signal (5 or more short, rapid blasts on the whistle) to be sounded by: 1) Either vessel in a meeting situation to indicate doubt about the intentions or actions of the other vessel 2) A vessel at anchor to attract attention 3) The give-way vessel in a crossing situation to indicate that it is unable to keep out of the way of the stand-on vessel. The other options are incorrect because the danger signal is not limited to just one specific situation - it can be used in multiple circumstances to alert other vessels of a potentially dangerous situation.