Hollis Explorer User Manual - page 96
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Skill
Number
Skill
Learning
Requirement
Purpose
Details
4
Carry and use of
additional bailout
gas
Carry external
bailout gas cylinder
on dives deeper
than 18 m/60 ft.
Practice use of the
BOV and external
bailout. Perform
static and dynamic
open circuit bailout
drill. Include at least
2 OC ascents from
bottom the bottom
to approximately 6
m/20 ft
To verify bailout
systems function. To
ensure the diver is
correctly weighted
to maintain depth
control under all
urgent/emergen-
cy conditions. To
reinforce how to
deal with a hyper-
capnia situation and
reinforce involved
muscle memory.
The unit should be
weighted to offset
the buoyant volume
of the EXPLORER.
Additional weight is
needed to com-
pensate for their
exposure suits and
additional bailout
cylinder.
Switch to off-board
open circuit via
the BOV. Ascend
slowly. The biggest
buoyancy change
is in the last 10
m/33 ft, and ideally
the student should
remain horizontal
within this depth
range. Weighting
should be such that
automatic venting
should control the
ascent.
(This skill should
be conducted
twice, 1st along a
contoured bottom
or shot line; the
2nd time with an
SMB.)