Federal law requires all vessels, including PWC, to have a Type B fire extinguisher on board if one or more of the following conditions exist:
- Any inboard engine
- Closed compartments where portable fuel tanks may be stored
- Double bottoms not sealed to the hull or which are not filled completely with flotation material
- Closed living spaces
- Closed storage compartments in which flammable or combustible materials may be stored
- Permanently installed fuel tanks (any tank where the removal of the tank is hampered by the installation of tie-down straps or clamps)
Additionally, every vessel that has an engine other than an electric motor must have a fire extinguisher on board. Foam, carbon dioxide, dry chemical, and halon extinguishers may be used to fight Type B fires.
Approved types of fire extinguishers are identified by the following marking on the label—“Marine Type USCG Approved”—followed by the type and size symbols and the approval number.