46 C.F.R. § 181.500
Required number, type, and location
(a) Each portable fire extinguisher on a vessel must be of an approved type. The minimum number of portable fire extinguishers required on a vessel must be acceptable to the cognizant Officer in Charge, Marine Inspection, but must not be fewer than the minimum number required by table 1 to § 181.500(b) and other provisions of this section.
(b) Table 1 to § 181.500(b) indicates the minimum required classification for each space listed. Extinguishers with larger numerical ratings or multiple letter designations may be used if the extinguishers meet the requirements of the table.
| Space | Portable fire extinguishers | |
|---|---|---|
| Minimum
required rating | Quantity and location | |
| Operating Station | 10-B:C | 1. |
| Machinery Space | 40-B:C | 1 in the vicinity of the exit. |
| Open Vehicle Deck | 40-B | 1 for every 10 vehicles. |
| Accommodation Space | 2-A | 1 each for each 2,500 square feet (232.3 square meters) or fraction thereof. |
| Galley | 40-B:C | 1. |
| Pantry, concession stand | 2-A | 1 in the vicinity of the exit. |
(c) A vehicle deck without a fixed sprinkler system and exposed to weather must have one 40-B portable fire extinguisher for every five vehicles, located near an entrance to the space.
(d) The frame or support of each semi-portable fire extinguisher permitted by paragraph (a) of this section must be welded or otherwise permanently attached to a bulkhead or deck.