Question 1945 Deck General

The correct answer is D) are permitted on vessels less than 65 feet carrying not more than 12 passengers. The small passenger vessel regulations allow the use of air-cooled radiators for gasoline propulsion engine cooling on vessels less than 65 feet in length carrying 12 or fewer passengers. This is because the cooling requirements for these smaller vessels are less demanding compared to larger vessels, and air-cooled radiators can provide sufficient cooling in this context. The other options are incorrect because: A) a double fan installation is not a requirement for air-cooled radiators, B) there is no specific approval requirement for marine use, and C) fresh water filling is not mandated for air-cooled radiators on these small passenger vessels.