| Space | Classification (see § 193.50-5) | Quantity and location |
|---|---|---|
| Safety Areas 1 | ||
| Wheelhouse or fire control room | None required. | |
| Stairway and elevator enclosures | Do. | |
| Communicating corridors | A-II | 1 in each main corridor not more than 150 feet apart. (May be located in stairways.) |
| Lifeboat embarkation and lowering stations | None required. | |
| Radio room | C-I 2 | 2 in vicinity of exit. 2 |
| Accommodations 1 | ||
| Staterooms, toilet spaces, public spaces, offices, lockers, isolated storerooms, and pantries open decks, etc | None required. | |
| Service spaces | ||
| Galleys | B-II or C-II | 1 for each 2,500 square feet or fraction thereof suitable for hazards involved. |
| Machinery spaces | ||
| Paint and lamp rooms | B-II | 1 outside space in vicinity of exit. |
| Accessible baggage, mail, and specie rooms, and storerooms | A-II | 1 for each 2,500 square feet or fraction thereof located in vicinity of exits, either inside or outside the spaces. |
| Carpenter shop and similar spaces | A-II | 1 outside the space in vicinity of exit. |
| Coal-fired boilers: Bunker and boiler space | None required. | |
| Oil-fired boilers: Spaces containing oil-fired boilers, either main or auxiliary, or their fuel-oil units | B-IIB-V B-V | 2 required. 3 1 required. 4 |
| Internal combustion or gas turbine propelling machinery spaces | B-II | 1 for each 1,000 brake horsepower, but not less than 2 nor more than 6. 5 |
| B-III | 1 required. 6,7 | |
| Electric propulsive motors or generators of open type | C-II | 1 for each propulsion motor or generator unit. |
| Enclosed ventilating systems for motors and generators of electric propelling machinery | None required. | |
| Auxiliary spaces: | ||
| Internal combustion gas turbine | B-II | 1 outside the space in vicinity of exit. 7 |
| Electric emergency motors or generators | C-II | 1 outside the space in vicinity of exit. 8 |
| Steam | None required. | |
| Trunks to machinery spaces | Do. | |
| Fuel tanks | Do. | |
| Scientific spaces | ||
|
Code of Federal Regulations
350
|
||
| Chemistry laboratory or scientific laboratory | C-II | 1 dry chemical and 1 carbon dioxide for each 300 square feet or fraction thereof, with one (1) of each kind located in the vicinity of the exit. |
| Chemical storeroom | C-II | Same as for the chemistry laboratory. |
| 1 Two B-I hand portable fire extinguishers may be substituted for 1 B-II. | ||
| 2 For vessels on an international voyage, substitute 1 C-II in vicinity of exit. | ||
| 3 Vessels of less than 1,000 gross tons require 1. | ||
| 4 Vessels of less than 1,000 gross tons may substitute 1 B-IV. | ||
| 5 Only 1 required for motorboats. | ||
| 6 If oil burning donkey boiler fitted in space, the B-V previously required for the protection of the boiler may be substituted. Not required where a fixed carbon dioxide system is installed. | ||
| 7 Not required on vessels of less than 300 gross tons if fuel has a flash-point higher than 110 °F. | ||
| 8 Not required on vessels of less than 300 gross tons. | ||