Hollis Explorer User Manual - page 93
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6
.1
Water is allowed to then move into the top of the exhale counterlung. This
is acceptable for the following reasons:
1. Water entering the counterlung is forced out again by through LCV
system.
2. A small amount of water will not affect the CO
2
absorbent performance.
To move water out of the loop via the LCV system: Close the mouthpiece*.
Then put the breathing hoses above your head and shake the hose,
squeezing the exhale hose like an accordion will move water down the
hose quickly.
Now return to the loop and keep breathing normally. If water continues to
enter the loop, abort the dive and solve the issue out of the water. You may
then submerge the unit in a tub of water, with the unit pressurized and the
loop closed, to locate the leak. A common leak point might be a BOV that
is not fully open or closed or a rubber mouthpiece on the BOV.
BAILOUT AND ASCENTS
Open circuit bailouts become necessary if a loop is unbreathable (high
CO
2
or low/high PO
2
) or flooded. In the unbreathable scenario the loop will
need to vent during the ascent. This is done automatically by the OPV and
the LCV combined.
! WARNING: Ascents must be practiced on the training course while
on open circuit and with a loop full of gas. Venting will occur natu-
rally if the diver is weighted correctly.
! WARNING: A flooded loop will result in 5 kg/42 Newtons (11 lbs) of
buoyancy loss. If a diver is over-weighted, they may not be able to
overcome this negative buoyancy in an emergency. Proper weight-
ing is important.
IN-WATER SKILLS
In-water skills are a vital element of dive training. It is important, especially
when teaching complex skills or equipment, that training is progressive.
Non-progressive training only serves to scare and confuse students and
at best reduce the learning experience to a series of ‘hoops’ that should
be jumped through. This is not the goal at all; the desire to learn should
* Follow all local standards and training agency guidelines regarding available breathing
sources while executing this skill.