6 compass – SUUNTO Vector HR User Manual
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7.5.4 What is temperature compensation?
When the unit is temperature compensated, the altitude measurement of the unit is not affected by the temperature of the unit itself. 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 Wristop computers are temperature compensated within the range –5 to 40 ° f / - 0 to +60 ° c.
7.6 CoMPass
7.6.1 What is the purpose of the rotating outer bezel?
the purpose of the rotating bezel is that people can use the instrument as a regular base plate compass if they want to, and use the
bezel to e.g. indicate north when in the bearing tracking mode or leaving the compass display for another mode.
also, it can be used to manually follow your vertical progress by using the north indicator on the bezel to mark the altitude from where
you want to follow your progress (i.e. a zero point). you could also mark a certain altitude, which is graphically shown by the segments
on the circumference, to get an intermediate difference measurement. However, the bezel is mainly related to the compass function.
7.6.2 Where do I find the correct declination for my area so I can
set my Wristop Computer?
local declination, either e or W, is usually marked on maps with either one-degree or half-degree accuracy.
7.7 effeCT of aIR TeMPeRaTuRe on alTITude
MeasuReMenT
The atmospheric pressure means the weight of air mass above the observer: at a higher altitude there is less air than at a lower altitude.
the principle of an altimeter is to measure the different air pressure between different altitudes.
the air weight is affected by the outside temperature. consequently the air pressure difference between two altitudes is also dependant
on temperature.
The altitude calculation of Wristop Computer is based on the air pressure at certain normal temperatures. Each altitude has a definitive
normal temperature. the normal temperatures at each altitude are presented in table .