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3.3.4. Reference altitude and barometric pressure
To ensure that the altimeter shows correct readings, you first have to set an accurate
reference altitude. To do this, go to a location whose altitude you have checked, for
example, with the help of a topographical map, and set the reference altitude to
match the map reading.
If you do not have accurate altitude information, you can use the current sea-level
barometric pressure as the reference value. Your Suunto t6 has a factory-set
reference altitude that corresponds to the standard barometric pressure (1013 hPa/
29.90inHg at sea level).
Setting the reference altitude
To set the reference altitude:
1. In the Alti/Baro menu, scroll to Refer and press
ENTER.
2. Altitude is the first menu item. Press ENTER to select
it.
3. Change the altitude with UP/DOWN and press ENTER.