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Does the Observer show future trends in weather conditions?
No, the Observer continually accumulates data on barometric pressure and stores the data of
last 4 days. The barometric trends of the last 6 hour window is displayed graphically with an
arrow in the top field. The Observer does not make forecasts of the future weather, it stores data
that supports you doing this. Remember that estimating the coming weather should be based on
different signs of nature in addition to the barometric trend.
What does absolute pressure and sea level pressure mean?
Absolute pressure is the actual pressure in any location at any given time. Sea level pressure
equals the corresponding pressure at sea level for a certain altitude that you are at. For example,
if you are at an altitude of 1,000 m/3,300 ft the absolute pressure normally is around 900 hPa/
26.60 inHg. The relative pressure at sea level would then be around 1,013 hPa/29.90 inHg.
What is temperature compensation?
When the unit is temperature compensated, the temperature of the unit itself does not affect the
altitude measurement of the unit. The unit can be worn on your wrist or placed on a table - it will
in either case give you the proper altitude reading providing the weather conditions have not
changed. All Suunto Observers are temperature compensated within the range -5 to 140 ° F / -
20 to +60 ° C. Refer to Chapter 3, Effect of Air Temperature on Altitude Measurement.
Why is the compass not working correctly?
It has been exposed to external electromagnetic disturbance and has to be calibrated.
Refer to Chapter 5, Calibrating the Compass.
Where do I find the correct declination for my area so I can set my Observer?
Local declination, either E or W, is usually marked on maps with either one-degree or half-
degree accuracy.
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