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* If none of the buttons are pressed for about 3 minutes during each of the displays of the dive plan
mode, the watch automatically returns to the time mode of the standard mode.
* The dive condition mark of the dive plan display changes to the high altitude mark in environments at
an air pressure equivalent to high-altitude diving.
2. NITROX Setting
The NITROX setting is for use when diving with a mixed gas having an oxygen concentration
that differs from that of air tanks used for ordinary diving (oxygen concentration: 21%). Set the
watch to AIR for all other types of diving. The watch will return to the AIR dive mode
automatically after 6 hours have elpased without diving, or, 30 minutes have elpased during
surface interval time after NITROX diving.
DANGER
Always double check the oxygen concentration (O2%) before each and every NITROX
dive.
It is very important to ensure that the percentage of oxygen carried in your tank, maches
the setting of the watch exactly. Failure to comply with this instruction may result in
decompression sickness, oxgen toxication or death .
The oxygen concentration (O2%) setting cannot be changed whilst diving, therfore always
check that the correct O2% is set before diving.
3. High-Altitude Setting
Since air pressure decreases at high altitudes, it is necessary to take this change in air pressure
into consideration when calculating the body partial pressure of oxygen. This watch periodically
measures air pressure and then calculates the body partial pressure of oxygen each time based
on the measured air pressure, thereby eliminating the need to manually set the watch for high
altitudes. In environments where air pressure is low, the watch automatically judges the
environment to be a high-altitude environment, and the dive condition mark changes to the high
altitude mark ( or ). The altitude at which the dive condition mark changes to the high
altitude mark is about 300 m (1,000 ft) above sea level.
CAUTION
The high altitude mark is only intended to serve as a general indicator of high altitude.
There may be times when the dive condition mark does not change to the high altitude
mark even at altitudes above 300 m (1,000 ft) above sea level, or times when the dive
condition mark changes to the high altitude mark even though the watch is at a low altitude
below 300 m (1,000 ft) above sea level. In any case, the watch can still be used without
risk since the dive computer calculates the body partial pressure of oxygen corresponding
to the air pressure at that time.