Question 42 ONC02 - Second Mate/Third Mate Unlimited Tonnage

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), which govern both international and inland waters (often adopted or modified by local inland rules), specify minimum equipment requirements based on a vessel's length. * **Vessels less than 12 meters (including a 10-meter vessel):** Rule 33 (Equipment for Sound Signals) states that a vessel of less than 12 meters in length is **not** required to carry the specific sound signaling appliances (whistle and/or bell) mandated for larger vessels. Instead, it must carry **"some other means of making an efficient sound signal."** This "efficient sound signal" could be a horn, an air horn, a loud handheld siren, a manual fog horn, or another device capable of producing the required short and prolonged blasts. ### Why the Other Options are Incorrect: **A) A bell only:** This is incorrect. A bell is required for vessels 100 meters or more in length, and it is also required along with a whistle for vessels 12 meters or more (but less than 100 meters) under specific inland rules, but it is not the *minimum* requirement for a 10-meter vessel. **B) A whistle only:** This is incorrect. A whistle (horn) is required for vessels 12 meters or more in length, but it is not the minimum specific requirement for a vessel less than 12 meters (10 meters). **D) A bell and a whistle:** This is incorrect. This combination (whistle and bell) is mandatory for vessels 12 meters or more in length (under most inland rules) or vessels 100 meters or more (under COLREGs International Annex III). It is an excessive requirement for a 10-meter vessel.