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in a half-moon shape. The position of the icon indicates whether the Observer is being used
as a weather station (barometer function) or altimeter.
NOTE: This is different than moving between ALTI and BARO main modes.
THIS IS IMPORTANT.
The use indicator has to be in ALTI position, otherwise the altitude display is fixed.
When Altimeter Use is selected:
The unit will be used as an altimeter.
All pressure changes are interpreted as altitude changes.
The sea level pressure reading displayed in the barometer mode will not change, even though
the absolute pressure reading will change.
When Barometer Use is selected:
The unit will be used as a weather station.
The unit interprets all pressure changes as being due to a change in the weather.
Measured changes will affect only the pressure reading displayed in the barometer mode.
Both sea level pressure and absolute pressure reading will change. These changes wont
affect the altitude reading in the altimeter mode while barometer use is activated.
The Observer leaves the factory set to be used as an altimeter.
SETTING THE ALTIMETER
In setting the Altimeter, there are two processes that can be performed:
The Reference Altitude (known altitude at the current location); and
The Altitude Alarm (signals you when a certain programmed altitude is reached).
IMPORTANT NOTE:
In order to set the altitude in the Altimeter mode, the altitude must be known. That information
can be found by utilizing a topographical map, identifying the current location with the associated
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