TM 5-4220-231-14&P
b. Operational
Capabilities and Features.
The SDASS will support up to three surface-supplied
divers for one
diving day (8 to 12 hours)
during
construction,
salvage,
recovery,
repair,
and emergency
diving
missions.
It is
capable
of providing
a secondary
life support
air source
for a recompression
chamber
by pressurizing
it to 165 fsw
and maintaining
adequate
ventilation
for at least
one hour.
The SDASS
will provide
the topside
supervisor
and
operator
with constant
and accurate
depth
monitoring
to within +0.25
percent
of full gage
scale
to a maximum
of
250 fsw for each diver supported.
The SDASS
can be prepared
for use within 60 minutes
and returned
to stowage
configuration
within 30 minutes.
1-8.
Location
and
Description
of Major Components.
3
3
1
2
IL
5
5
4
5
5
Figure
1-1.
Special
Diver Air Support
System
DIVER AIR CONTROL
CONSOLE
(DACC) (1).
Receives
HP air from the DASS or the LP compressor.
Controls
the diver air supply
to the volume
tank assembly.
Provides
depth
monitoring
for three
divers.
VOLUME TANK ASSEMBLY
(VTA) (2).
Stores
LP air, supplied
from the DACC, providing
breathing
air for up to
three
divers.
DIVER AIR STORAGE
SYSTEM
(DASS)
(3). Provides
HP air storage.
Consists
of two groups
of four racks,
each
containing
two 5,000
psig HP Kevlar flasks
(total of 16 flasks).
CHAMBER
REDUCING
STATION
(CRS)
(4).
Provides
the recompression
chamber
with LP air from the DASS or
LP compressors.
DECK AND INTERCONNECTING
HOSES
(5).
HP deck
hoses
are used
to connect
the HP compressor
to the
DASS, and the DASS to the DACC and CRS.
HP interconnecting
hoses
are also used
between
flask racks.
LP
deck hoses
are used to connect
the LP compressors
to the DACC and CRS,
and the DACC to the VTA.
LP deck
hoses
are also used to connect
the CRS to the recompression
chamber.
1-6
