Question 42 ONC03 - Master LT 500-1600 GRT

The Correct Answer is C ### Why Option C is Correct: **C) Any means of making an efficient sound signal** is correct because the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 33(1) and Annex III, specify the requirements for sound signaling equipment based on the vessel's length. For a vessel **less than 12 meters** in length (such as a 10-meter vessel), the regulations state that the vessel shall not be obliged to carry the sound signaling appliances prescribed for longer vessels (a whistle and a bell). Instead, such a vessel: * **Must be provided with some means of making an efficient sound signal.** This requirement is deliberately flexible, acknowledging that small vessels may not have the space or need for a fixed whistle or a bell, but they still need a reliable way to signal their intentions or position in restricted visibility. This could be a horn, a portable air horn, a mechanical siren, or any other device capable of producing the regulated signals effectively. ### Why Other Options Are Incorrect: **A) A bell only:** This is incorrect. A bell is required only for vessels **12 meters or more** in length, and it must be carried *in addition to* a whistle for vessels 12 meters up to 20 meters. It is not the *minimum* or mandatory equipment for a vessel under 12 meters. **B) A whistle only:** This is incorrect. A whistle is mandatory for vessels **12 meters or more** in length. It is not explicitly required for a 10-meter vessel, provided it has an alternative "efficient means" of signaling (Option C). **D) A bell and a whistle:** This is incorrect. These two specific pieces of equipment are mandatory for vessels **12 meters or more** in length (whistle) and **12 meters or more** (bell). A 10-meter vessel is specifically exempted from needing both, requiring only an "efficient sound signal" (Option C).