Question 42 ONC01 - Master/Chief Mate Unlimited Tonnage

The Correct Answer is C ### Why Option C ("Any means of making an efficient sound signal") is correct: The equipment requirements for sound signals are defined in the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 33(1) and Annex III. For vessels less than 12 meters in length (like the one described, which is 10 meters): * **COLREGs Rule 33(1)** requires vessels to be provided with "equipment for sound signals." * **Annex III, Section 1(a)** specifies that a vessel less than 12 meters in length is **not** required to carry a whistle or a bell, but "shall be provided with some other means of making an efficient sound signal." Therefore, for a 10-meter vessel, the minimum requirement is simply **any means of making an efficient sound signal**—something that can produce the required blasts and signals for maneuvering or restricted visibility. ### Why the other options are incorrect: * **A) A bell only:** This is incorrect. A bell is required for vessels 12 meters or more, but is not the minimum requirement for a vessel under 12 meters. A bell alone may not be sufficient for making the required rapid and distinct sound signals (like one short blast). * **B) A whistle only:** This is incorrect. A whistle is required for vessels 12 meters or more, but is not the minimum requirement for a vessel under 12 meters. * **D) A bell and a whistle:** This is incorrect. This combination is generally required for vessels 20 meters or more. It far exceeds the minimum requirements for a 10-meter vessel.