Ocean Technology Systems Guardian, Owner'S Manual

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Overtightening the top strap will cause the center of the head harness to
sit high on the back of the head. This results in the mask being pulled up
on your face and not back , as desired. Consequences of this error include
leaking, jaw fatigue, and an uncomfortable dive. If you feel the need to
tighten the top strap, pull down on the back of the head harness to ensure
its proper positioning low on the back of the head. You can then tighten the
top strap as necessary.
Finally, check that you can restrict your nostrils to equalize your ears.
Experiment with what works best for you. Most will find that pushing up on
the regulator at approximately 45° angle will work. For others, pushing in
on the top of the visor will press the equalizing block to the nose, allowing
equalization. If the pad is too high, you will not be able to breathe through
your nose when wearing the mask. If the pad is too low, you will not be able
to reach your nose to equalize. As previously shown, your Guardian mask
comes with an equalizing assembly kit that will allow you to adjust the
height of the pad. Each base pad (equalizing block) has two adjustment
slots. (See www.otscomm.com/full-face-mask-training-videos/ for
demonstration.)
DIVING THE GUARDIAN
Pre-Dive
Once you have donned your mask and ensured your air is on, check the
system by closing the ABV. The regulator should breathe easily and you
will feel the air as it flows through the visor area of the mask. There should
be very little exhalation resistance.
Prior to entering the water, close the ABV and check your submersible
pressure gauge (SPG). This is done by taking two deep breaths through
the mask while observing your SPG. You should see slight drop in
pressure. If you see a significant drop in pressure, check that your air
supply is working properly. If the gauge shows a drop, and your air supply
is turned on correctly, have your equipment examined immediately for
proper function.
Training & Emergency Procedures
Even if you have prior FFM diving experience, take some time to dive
the mask in a pool or similar environment. Follow the guidelines in this
manual and seek additional instruction if necessary. Learn how to dive the
Guardian to a point that you feel
completely
comfortable with all aspects.
In addition to how to use the equipment, there are emergency procedures
for out-of-air (OOA) situations and possible equipment failure situations
requiring bailout and switching to an alternate air source. Do not dive
this or any equipment until you have properly learned these emergency
procedures!