All vessels on federally controlled waters are required to have a Type B fire extinguisher on board if one or more of the following conditions exist:
- Inboard engine
- Double bottoms not sealed to the hull or not filled completely with flotation materials
- Closed living spaces
- Closed compartments where portable fuel tanks may be stored or in which flammable or combustible materials may be stored
- Permanently installed fuel tanks
Vessels on Iowa state waters are required to have a Type B fire extinguisher on board if the vessel is propelled by an outboard motor of greater than 10 horsepower.
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.