197.332—PVHO—Decompression chambers.
Each decompression chamber must—
(b)
Have internal dimensions sufficient to accommodate a diver lying in a horizontal position and another person tending the diver;
(c)
Have a capability for ingress and egress of personnel and equipment while the occupants are under pressure;
(d)
Have a means of operating all installed man-way locking devices, except disabled shipping dogs, from both sides of a closed hatch;
(e)
Have interior illumination sufficient to allow visual observation, diagnosis, and medical treatment of an occupant.
(2)
The maximum depth of the dive, when used for diving operations deeper than 300 fsw, unless a closed bell meeting the requirements of § 197.330(a) (3), (4), and (5) is used;
(i)
Have a minimum pressurization rate of 2 ATA per minute to 60 fsw and at least 1 ATA per minute thereafter;
(l)
Have a capability to supply breathing mixtures at the maximum rate required by each occupant doing heavy work; and
(m)
Have a sound-powered headset or telephone as a backup to the communications system required by § 197.328(c) (5) and (6), except when that communications system is a sound-powered system.