This is the recommended Navy finish. Other equivalent finishes may be used
if a different color is desired. Whatever colors are used, painting should
be kept to an absolute minimum.
(4) Sound Deadening Materials. Sound deadening materials, when
installed within the chamber, must be noncombustible in that they will not
burn in 100 percent oxygen at pressures up to 3 ATA (44.1 psia), and must not
be a sponge like material that will retain moisture and promote bacterial
(1) Two-hour Fire-Resistant Construction. The chambers and all
ancillary service equipment must be housed in two-hour fire-resistant
construction in an isolated building or isolated part of a building.
The building must have adequate separation distance in accordance with NAVFAC
Design Manual DM-8, Fire Protection Engineering.
(2) Doors. The isolated part of the building must isolate the
chamber space from other parts of the building with a two-hour fire-resistant
wall with openings protected by at least Class B label, 1-1/2-hour fire
flame-spread rating of 25 or less and a smoke-developed rating of 50 or less.
(4) Sprinklers. Areas housing the chambers and service equipment
must be protected by an automatic sprinkler system.
EMERGENCY BREATHING APPARATUS.
Individual breathing apparatus shall be provided for each chamber
occupant. Breathing mixture shall be independent of the chamber atmosphere
and shall be sufficient for simultaneous use of all breathing apparatus.
Apparatus shall function at all chamber pressures.
Portable self-contained breathing apparatus shall be available
outside the chamber for use by support personnel.