|I have squeezed in
twin 2l tanks into this design to give a flexible rig for open water diving.
This is the bastard-child of Dave Sutton's
with some additions/modifications. The heart of the system is
KISS injector, plumbed in green. I should mention it is all colour
coded, green=oxygen, blue = diluent, yellow=bailout and black for anything
else. Size was not as much of a consideration as with other IDA-71 units as
the aim was to make a flexible unit which could run over a weekend without
refilling and capable of safe descents to 200 ft.
I added in a straight gas block with 1/4" ports under the breathing bag
(single bag design) with nine ports. The gas block is supplied via a gas
switch on the lower right of the device allowing everything inside the rig
to be run off inboard or off board gas. The switch itself is pointing
towards my back through the casing and I have to reach behind me to switch
the lever. This allows me to switch gases easily but the switch cannot
switch by being hit on something while diving.
One last modification was fitting a pair of OMS manifold protectors as
'feet' which protect the protruding manifolds and allow the unit to stand up
easily for donning and storage. I just recently 'clipped' the feet so they
do not rub on the back of my legs anymore. The stainless steel protectors
will also allow me somewhere to mount an ass-mount bailout bottle should I
want to in the future.
Oxygen is monitored by a dual sensor through a P-port of Dave Sutton's
'Shop of Horrors' and a VR-3 is used for decompression monitoring. The DSV
is from Gordon Smith, his new integrated bailout device which works
beautifully and will accept a 'snog valve' if I ever get around to wanting
to install one. The harness is a DiveRite Transpac II which fits very nicely
via a quick release mechanism (not shown) to the shell. I can use the same
harness for CCR and OC with very little time to switch. I feel diving the
same harness configuration in both types of diving adds to my familiarity of
the equipment and adds to safety.
The system is a fully closed manual CCR with dual diluent and integrated
bailout which can be run off either on-board or off-board gas for maximum
flexibility to dive the widest possible range of different profiles without
needing to modify the machine in-field.