Question 42 ONC04 - Mate of LT 500-1600 GRT

The Correct Answer is C ### Why Option C is Correct: **C) Any means of making an efficient sound signal** The International Regulations for Preventing Collisions at Sea (COLREGs), Rule 33(1) and Annex III govern sound signaling equipment. * **Vessels under 12 meters in length (like a 10-meter vessel)** are not required to carry the specific equipment (whistle and bell) mandated for larger vessels (12 meters and over). * Instead, they must be provided with **"some other means of making an efficient sound signal."** This is due to the practical difficulty of mounting full-sized, standardized signaling equipment on very small craft. The "efficient means" can be a manual horn, a compressed gas horn, or even a portable electric horn, provided it can produce the signals prescribed in Rule 34. ### Why Other Options Are Incorrect: **A) A bell only:** While a bell is required for vessels 12 meters to less than 20 meters, and a whistle is also required for those vessels, a vessel under 12 meters is not specifically required to carry a dedicated bell. **B) A whistle only:** A dedicated whistle (as defined by COLREG standards for larger vessels) is not mandatory for vessels under 12 meters. The requirement is for an *efficient sound signal*, which may or may not be a standard whistle. **D) A bell and a whistle:** This combination is the minimum requirement for vessels between 12 meters and 20 meters in length (Rule 33). It is an excessive and incorrect requirement for a vessel only 10 meters in length.