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Delta 3 and Gamma 2 (Primary and Octopus)
Pre-Dive/Dive Switch (on top):
The Delta 3 and Gamma 2 feature a Pre-Dive / Dive switch located on top of the body.
Placing the switch in the left ( - ) position (Pre-Dive) reduces, or eliminates, the possibil-
ity of high volume free-flow when the mouthpiece is not in your mouth.
Placing the switch in the right ( + ) position (Dive) provides optimum performance dur-
ing a dive.
Delta 3 Adjustment Knob (on side):
The Delta 3 provides a breathing effort adjustment (knob on the side of the body) that en-
ables you to adapt breathing performance to different diving conditions.
By turning the adjustment knob 'clockwise' breathing resistance (effort) is increased.
This is done to prevent undesirable loss of breathing gas (free flowing) that often oc-
curs when a high performance regulator second stage is connected as an octopus sec-
ond stage, or when the primary second stage is not in the divers mouth, such as
when surface snorkeling.
Turning the adjustment knob 'counter clockwise' decreases breathing resistance and
reduces work of breathing. Adjustment should be used to improve performance, it
should not be used as a method to use less breathing gas. During periods of heavy
exertion underwater, and to compensate for the effects of depth, it is advantageous to
have a regulator that can provide minimal inhalation resistance and optimal perfor-
mance when desired.
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