Question 980 Rules of the Road

The correct answer is B) One prolonged and two short blasts every two minutes. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel pushing ahead is required to sound this signal when the vessel's vision is restricted by heavy weather conditions such as a rain storm. The prolonged blast followed by two short blasts indicates that the vessel is not under command and may have limited ability to maneuver. The other options are incorrect because they do not match the specific signal required for a vessel pushing a barge in restricted visibility. Option A would be the signal for a vessel not under command, option C is the signal for a vessel constrained by her draft, and option D would only be appropriate for a vessel at anchor.