Question 998 Rules of the Road

The correct answer is B) One prolonged and three short blasts. According to the International and Inland Navigation Rules, a vessel being towed, if manned, shall sound the fog signal of one prolonged blast followed by three short blasts. This signal indicates that the vessel is not under command and may not be able to maneuver as required to avoid a collision. The other options are incorrect because they do not match the specific fog signal required for a manned vessel being towed. Option A (three short blasts) is the signal for a vessel not under command, while options C (one prolonged and two short blasts) and D (two short blasts) are incorrect fog signals that do not apply to this situation.