Question 39 GLI01 - Master-Unlimited Tonnage

The Correct Answer is C The duration of each prolonged blast on whistle signals used by a power-driven vessel in fog, whether making way or underway but not making way, is defined in the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 32, which addresses definitions related to sound signals. Rule 32(b) states: "The term 'prolonged blast' means a blast of from **four to six seconds** duration." This definition applies to both International and Inland waters regulated under COLREGs/US Inland Rules, making option C the correct duration. ### Why the other options are incorrect: * **A) about one second:** This duration aligns with the definition of a "short blast" (Rule 32(a)), not a prolonged blast. * **B) two to four seconds:** This range is too short. While close to the lower limit, it does not fully encompass the officially defined range for a prolonged blast (four to six seconds). * **D) eight to ten seconds:** This duration is too long and does not correspond to the official definition of either a short or a prolonged blast.