4.5 REQUIREMENTS - IN GENERAL
Fire extinguishing equipment (portable or fixed) shall be U.S. Coast Guard approved, and listed or approved by a recognized independent testing laboratory. The installation and use of such fire extinguishing equipment shall be in accordance with the manufacturer’s instructions.
Inboard and sterndrive boats with engine compartments shall have either:
a fixed fire extinguishing system installed in the machinery space (see A-4.7
a single suitably sized clean agent portable fire extinguisher provided and installed in proximity to a port to permit discharge directly into the engine compartment without opening the primary access. (See TABLE IV
for determination of the minimum portable clean agent fire extinguisher size for this usage.)
The provision such as a discharge port shall be:
sized to accept the portable fire extinguisher discharge nozzle,
able to be opened from outside the compartment to provide ready access for discharge of the agent into the engine compartment, and
located so the required size portable fire extinguisher can be properly discharged in accordance with the manufacturer's instructions.
NOTE: A discharge port located in a horizontal surface may not allow the portable fire extinguisher to be properly or completely discharged, unless the extinguisher is equipped with a hose and nozzle.
A label that complies with A-4.5.6
shall be affixed adjacent to or as part of the discharge provision providing information to avoid misuse and possible personal injury.
NOTE: An example of such a label follows.