What type of fire extinguisher should be on a vessel with a permanently installed fuel tank perm?

A vessel with a permanently installed fuel tank should be equipped with a Class B fire extinguisher, which is specifically designed to combat flammable liquids, including fuels. Additionally, having a Class A extinguisher for solid combustibles and a Class C extinguisher for electrical fires can provide comprehensive protection. It's important to ensure that the extinguishers are easily accessible and regularly maintained. Always check local regulations for specific requirements.