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Altimeter Performance
When ALTI mode is first entered,the watch will update the
altitude information every two seconds and will continue
this fast data update rate for thirty minutes.After thirty
minutes elapses,if the watch determines that the altitude
is no longer changing significantly,it will reduce its data
update rate to that of the barometer function (every 2.5
minutes).At that point, two things will happen:
1. The weather icons will appear in the upper part of the
display indicating the forecast.
2. The watch will stop data accumulation for the ACC
and HIGH statistics.
The watch will continue to monitor the air pressure at this
slower rate and,if it determines that the altitude is chang-
ing significantly,it will go back to faster update rate.If this
change occurs,the weather icons will be removed from
After the accumulated data is displayed, the watch
will then display either of the following views of the
altitude data:
• Current time,altitude and temperature data.
• A graph of the altitude changes for the last five hours
(each column represents 10 minutes) shown in the
center of the display.The current time is displayed in
the upper line and the current altitude is displayed in
the lower line.
Press and release the START/SPLIT button to switch
between these two views.
Selecting Altitude Units
While viewing the current time,altitude and temperature
data, press STOP/RESET to switch units between feet (FT)
and meters (M).
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