Question 954 Rules of the Road

The correct answer is B) A vessel being towed. According to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel being towed is required to sound one prolonged blast followed by three short blasts to indicate its status. This signal is distinct from the signals for other vessels, such as a vessel not under command (one prolonged blast) or a vessel in distress (three short blasts). The other options are incorrect because they do not match the given sound signal. A vessel not under command would sound one prolonged blast, a sailing vessel would not make this particular signal, and a vessel in distress would sound three short blasts, not one prolonged and three short.