22-12 Change A
U.S. Navy Diving Manual—Volume 5
22-5
OPERATION
22-5.1
Predive Checklist. To ensure each item is operational and ready for use, perform
the equipment checks listed in the Recompression Chamber Predive Checklist,
Figure 22-11a.
22-5.2
Safety Precautions.
Do not use oil on any oxygen fitting, air fitting, or piece of equipment.
Do not allow oxygen supply tanks to be depleted below 100 psig.
Ensure dogs are in good operating condition and seals are tight.
Do not leave doors dogged (if applicable) after pressurization.
Do not allow open flames, smoking materials, or any flammables to be carried
into the chamber.
Table 22-2. Recompression Chamber Air Supply Requirements.
Recompression Chamber
Configuration
Primary Air Requirement
Secondary Air Requirement
CATEGORY A:
No BIBS overboard dump
No CO
2
scrubber
No air BIBS
No O
2
and CO
2
monitor
Sufficient air to press the IL once and the
OL twice to 165 fsw and vent during one
TT6A for one tender and two patients
with maximum extensions.
Sufficient air to press the IL and OL once
to 165 fsw and vent for one hour at 70.4
scfm.
CATEGORY B:
BIBS overboard dump
No CO
2scrubber
No air BIBS
O2
and CO
2
monitors
Sufficient air to press the IL once and the
OL twice to 165 fsw and vent for CO
2
during one TT6A for one tender and two
patients with maximum extensions.
Sufficient air to press the IL and OL once
to 165 fsw and vent for one hour at 70.4
scfm
CATEGORY C:
BIBS overboard dump
CO2
scrubber
No air BIBS
O2
and CO
2
monitors
Sufficient air to press the IL once and the
OL twice to 165 fsw.'
Sufficient air to press the IL and OL once
to 165 fsw and vent for one hour at 70.4
scfm
CATEGORY D:
BIBS overboard dump
CO2
scrubber
Air BIBS
O2
and CO
2
monitor
Sufficient air to press the IL once and the
OL twice to 165 fsw.
(For TRCS, sufficient air to power CO
2
scrubbers must be included)
Sufficient air to press the IL and OL once
to 165 fsw and enough air for one tender
and two patients (when not on O
2
) to
breathe air BIBS during one TT6A with
maximum extensions.
CATEGORY E:
BIBS overboard dump
CO2
scrubber
O2
and CO
2monitor
Spare CO
2scrubber
Secondary power supply
NITROX BIBS
No Air BIBS
Sufficient air to press the IL once and the
OL twice to 165 fsw.
Sufficient air to press the IL and OL once
to 165 fsw and enough air/ NITROX for
one tender and two patients (when not on
O2
) to breathe air/NITROX BIBS during
one TT6A with maximum extensions.
Notes:
1) Additional air source per PSOB will be requied for TT4, 7 or 8.
2) For chambers used to conduct Sur “D” sufficient air is required to conduct a TT6A in addition to any planned Sur “D”
