Hollis Explorer User Manual - page 24
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false warnings.
It takes considerable system intelligence and design experience to ensure
the warnings do not overload or falsely advise the user of problems. If
falsely warned too many times, then there is a reduced likelihood of the
diver responding correctly to a truly dangerous and potentially life-threat-
ening situation.
Mechanically it is vital that simple mechanical tasks required to set up the
EXPLORER are not ambiguous and prone to user error.
THE HEADS UP DISPLAY
The Heads Up Display (HUD) is an ergonomic addition for the diver, as it
gives a simplified and quick to follow view of the status of the EXPLORER.
The HUD as 3 main warning levels:
• Flashing Red plus vibration alarm - warning is activated when a dive
should be aborted on open circuit or not started.
• If diving, the diver should switch to the bailout gas.
• The HUD vibration alarm will vibrate every ¼ second for 10 seconds, and
then repeat the 10-second alarm every minute.
• Flashing Green and Blue Leeds - warning is activated when a manage-
able error situation is in place. The correct response is to ascend slowly on
closed circuit monitoring the Primary display.
• Solid Green - means there are no detected problems
WARNING: If any other light sequence or a ‘no light’ scenario is
experienced then the diver should refer to the wrist display for
information.
WARNING: If no wrist display is seen the diver MUST switch to
open circuit and ascend.
The LED states are configured for color blind as well as highly stressed div-
ers. The positions of the LED’s, the flashing or solid state, provide condi-
tions that cannot be confused with one another. Also, during stressful dive
scenarios, the position and status is quick to comprehend and therefore
intuitively the desired response is performed.
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