Hollis Explorer User Manual - page 126
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Glossary
Absorbent: chemical media used to remove CO
2
from exhaled gas
Absorbent Filter: Mechanical assembly where the CO
2
absorbent is housed
ADV: automatic diluent valve - a valve that automatically adds fresh gas supply to the counter-
lungs as it collapses from increased pressure of depth or if it is needed after venting too much
gas as in a mask clearing exercise.
Bailout: redundant gas supply system
Balance Tube: The tube between the exhale counterlung and the LCV. This tube removes
water from the counterlung and controls (breathing) loop pressure with the LCV.
BUD (Buddy Universal Display): Universal display on side of LSS module, codes identical to
HUD
BCD (Buoyancy Control Device): the harness/buoyancy compensator assembly
BOV: bail out valve
Breakthrough: where absorbent scrubber fails, no longer removing CO
2
at an adequate rate
Breathing Hose: The large hoses that connect the Canister assembly to the BOV
Breathing Loop: parts of the rebreather that breathing gas circulates within
Canister: Mechanical assembly where the Absorbent Filter is housed
Caustic Cocktail: very alkaline liquid (water mixed with CO
2
absorbent material)
CCR (CC): closed circuit rebreather
CO
2
: carbon dioxide
Diluent: a gas used for breathing volume and to reduce the fraction of oxygen in the Breathing
Loop
Dive Control Parameter (DCP): The control to define how high the oxygen level is set for the
dive profile.
Exhale Counterlung: The counterlung positioned behind the diver’s right shoulder
FO
2
: fraction of oxygen
Graphical User Interface (GUI): The display system for communicating information to the
diver
Heads Up Display (HUD): the LED display positioned in front of the mask
HP: high pressure
Inhale counterlung: the counterlung positioned behind the diver’s left shoulder
IP: intermediate pressure