Question 936 Rules of the Road

The correct answer is A) One prolonged blast. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel underway and making way in fog is required to sound one prolonged blast (4-6 seconds) every two minutes. This fog signal alerts other vessels in the area to the presence of your vessel, allowing them to take appropriate action to avoid a collision. The other options are incorrect because: B) Two prolonged blasts is the signal for a vessel not under command, C) Three short blasts is the signal for a vessel in distress, and D) A prolonged blast and three short blasts is the signal for a vessel towing another vessel.