How many fire extinguishers are present on the vessel?

The correct choice indicates that there are four 5-pound dry chemical fire extinguishers on the vessel. This number is significant because it aligns with the United States Coast Guard regulations regarding fire safety equipment on vessels, which require a minimum number of fire extinguishers based on the size and type of the vessel. Each 5-pound dry chemical fire extinguisher is suitable for a variety of fire types, including those involving flammable liquids and electrical fires, making them versatile and essential for onboard safety.

Having four extinguishers would typically provide adequate coverage for both the operational areas of the vessel and for any passenger spaces, ensuring that crew members can respond effectively in the event of a fire emergency. This capacity also allows for redundancy, meaning that if one extinguisher becomes inaccessible or discharged, others are available for use.