What is the minimum capacity of portable fire extinguishers required on vessels?

The minimum capacity of portable fire extinguishers required on vessels is determined by the need for an effective response to potential fire hazards onboard. A two-gallon extinguisher is significant as it balances the need for sufficient extinguishing agent while remaining manageable for crew members to operate effectively in emergency situations. This capacity is in line with safety regulations and standards that aim to ensure that vessels are equipped adequately to handle fires, especially in confined spaces where larger extinguishers may be impractical.

Having a two-gallon extinguisher allows for a reasonable quantity of extinguishing agent to combat small to moderate fires which might arise on a vessel, contributing to overall maritime safety.