Question 42 OSV01 - Master/Chief Mate - Offshore Supply Vessels

The Correct Answer is C ### Why Option C is Correct: **C) Any means of making an efficient sound signal** is the correct requirement for a vessel less than 12 meters in length, according to the International Regulations for Preventing Collisions at Sea (COLREGs), specifically Rule 33 (Equipment for sound signals). * **Rule 33(1)** sets the standard requirement for vessels 12 meters or more, requiring a whistle and a bell. * **Rule 33(2)** provides the exception for smaller vessels: "A vessel of less than 12 metres in length shall not be obliged to carry the sound signalling appliances prescribed in paragraph (1) of this Rule, but if she does not, she shall be provided with **some other means of making an efficient sound signal.**" Since the vessel in question is 10 meters long, it falls into the category of "less than 12 metres," meaning it is not required to carry the standard bell and whistle but must have *some efficient means* (such as a compressed air horn, a mechanical horn, or even a police whistle capable of being heard) to make the required maneuvering and warning signals. ### Why the Other Options are Incorrect: **A) A bell only:** Incorrect. While a bell is required for larger vessels (12m or more), it is not the *minimum* required equipment for a vessel under 12 meters. If the vessel is less than 12 meters, the requirement is only for an *efficient sound signal*, not necessarily a bell. **B) A whistle only:** Incorrect. Similar to the bell, a whistle is only mandatory for vessels 12 meters or more. For a 10-meter vessel, the standard whistle is not mandated, only an *efficient sound signal*. **D) A bell and a whistle:** Incorrect. This combination is the minimum requirement for vessels 12 meters or more in length (Rule 33(1)). A vessel of 10 meters is specifically exempted from this requirement by Rule 33(2).