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CALYPSO BC USER'S MANUAL

2. INTROdUCTION

The Calypso BC is specifically designed for military use with open circuit

breathing apparatus. The distribution of the buoyancy chamber provides

excellent safety performance, either during buoyant ascent (vertical stabil-

ity) or at the surface (natural support position with head and shoulders out

of the water).

2.1 pROdUCT deSCRIpTION

Powerline Inflator Assembly

•

MP ai

r is supplied to the inflator assembly by a quick disconnect inflator

hose attached to the first stage regulator. Air can be added to the BC by

pushing the power inflation button or added manually through the oral

inflator. The inflator assembly is connected with a heavy duty cable to

the Rapid Exhaust Valve (REV) at the top of the airway, which allows the

BC to be easily vented for fine buoyancy adjustments by simply pulling

on the inflator. A signal whistle is provided with the oral inflator for diver

safety. The quick disconnect (QD) fitting cover will keep water and debris

out of the inflators key components (See Fig. 1).

ORAL INFLATE

POWER INFLATE

Over Pressure Relief Valve (OPRV) and Rapid Exhaust Valve (REV)

•

The Over Pressure Relief Valve (OPRV) primary function is to relieve

excess air pressure from inside the BC bladder. The OPRV is a critical

feature that prevents stress or damage to the BC bladder. It can also

be opened manually to facilitate rapid dumping of air through the Rapid

Exhaust Valve (REV).

Outer Bag and Utility pocket

•

The outer bag is constructed of a heavy duty, urethane backed 840 de-

nier material that resists cuts, tears, and abrasion. The inner surface of

the collar is plush lined, to prevent chafing against bare skin. Featuring

a pleated utility pocket with "Hook and Loop" closure, the bag is sewn

throughout with high tensile nylon thread. Vented openings at the bottom

allows instant drainage when exiting the water. A clip and alligator "Hook

and Loop" attachment is provided to hold the H.A.B.D or S.E.A system,

an independent backup air source.

QD FITTING

COVeR

MP INFLATOR HOSE

WhISTLe

Figure 1

OVER PRESSURE RELIEF VALVE /

RApId eXhAUST VALVe