DeFLAtioN methoDS
Throughout the course of a dive, it may be necessary to release air from the Atlantis using one of the two
methods described in the following instructions. Each method uses a valve that is in a different location.
The method you choose at any time may depend on whether you are making your initial descent feet-first,
head-first or maintaining neutral buoyancy underwater. Always remember to utilize the valve that is at the
highest point on the bladder (closest to the surface), depending on your position in the water.
Deflation via Rapid Exhaust Valve (REV) (Primary Method)
Inside the inflator’s spiral hose is a steel cable that attaches the inflator to the dual valve at the top of the airway
assembly. You can vent air from the Atlantis by firmly pulling straight down on the inflator. Once resistance is
felt, a pull of only .25 in (7mm) is required. The Rapid Exhaust Valve (REV) provides an effective and convenient
way to vent air from the BC while in either an upright or face down swimming position
(Fig. 11)
. It also functions
as an Over Pressure Relief Valve (OPRV) that will open automatically to relieve excessive air pressure. This
feature is very critical for preventing stress or damage to the BC bladder
(Fig. 12)
.
Fig. 12
Fig. 11
Deflation via Oral Inflator (Secondary Method)
To deflate the Atlantis using the oral inflator, lift the inflator body to its highest possible position (above the
head). Press the oral inflator button
(Figs. 9 & 10 Step. B, previous page)
to start venting air. This method
is most effective on the surface when starting the initial descent.
CAUTION: The proper function of the Over Pressure Relief Valve (OPRV) is vital to
prevent damage to the BC bladder. Unauthorized service or tampering may render this
valve inoperable and could cause the bladder to leak or burst. This type of damage is
not repairable and is not covered under warranty.
WArNiNg:
Most training agencies recommend that you descend in an upright, feet-first
position, in order to maintain a slower and more controlled descent. this is especially
true if you experience difficulty equalizing your ears or if you are descending in low
visibility conditions.
NOTE: Depressing the oral inflator while the jacket is empty may cause water to enter the
air bladder.
NOTE: To deflate the Atlantis using the oral inflator (secondary deflation method), the oral
inflator must be untied from the oral inflator cord (military oral inflator only). The oral inflator
cannot be raised above the head while tied to the oral inflator cord.
14
Atlantis Technical Manual
