Question 482 Rules of the Road

The correct answer is C) A vessel being towed. According to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel being towed would not sound the signal of one prolonged blast and two short blasts. This signal is used by a vessel constrained by its draft, a minesweeping vessel, or a vessel engaged in fishing, but not a vessel being towed. The vessel being towed would instead sound the signal of one prolonged blast followed by three short blasts to indicate its status. The other options are incorrect because a vessel constrained by its draft, a minesweeping vessel, and a vessel engaged in fishing would all sound the one prolonged and two short blast signal as per the COLREGS.