Oceanic OC1, Operating Manual

Page: 79 / 180

79
PROXIMITY OF THE TMTS (Transmitters) AND OC1
The TMTs emit low frequency signals that radiate out in semicircular patterns parallel to the
length dimension of the TMT. A coiled antenna inside the OC1 receives the signals when
it is positioned within a zone parallel to or at a 45 degree angle to the TMT as illustrated.
The OC1 cannot effectively receive a signal when it is held out to the sides of the TMT
or held at distances greater than 4 feet (1.2 meters) in front of the TMT. Best reception is
achieved when the OC1 is within 3 feet (1 meter) of the TMT.
When installed into the high pressure ports of the Regulator First Stages, the TMTs must be
positioned so that they face horizontally outward from the Tank Valves.
Link Interruption Underwater
During a dive, you may at times move the OC1 out of the signal pattern of the TMT, result-
ing in a temporary loss of the Link signal. The Link will be restored within 4 seconds after
the OC1 is moved back into its correct position.
An interruption may also occur while the OC1 is within 3 feet
(1 meter) of a running DPV. The Link will be restored within 4
seconds after the OC1 is moved out of that area.
A temporary interruption may also occur shortly after a Strobe
flashes. The Link will be restored within 4 seconds.
If the Link is not restored within 15 seconds, the Audible will
sound, and the Pressure value and Link icon will flash (Fig. 65).
Fig. 65 - LOSS OF LINK