Altimeter Erfahrungen und Bewertung

Further, if you're a pilot the pressure in your cockpit is unlikely to be as accurate as the location of the static pitot tube and will be susceptible to changes due to air vents being opened, doors with gaps, any climate control, your speed and any vibration.

Air pressure changes throughout the day can cause readings to drift by up to 1 foot per minute, so keep the pressure-setting up-to-date by updating it whenever you can; as you get to any locations of known altitude or hourly if receiving pressure settings in some other way.

Your watch (or iPhone) pressure sensing device has not been calibrated in the same way that the expensive altimeters found in aircraft have been.

Set the pressure setting by rotating the 'crown' on your watch.

Another setting that pilots use is the standard setting of 1013.25mb. This is used above 3000ft roughly and instead of giving you an accurate 'Altitude' gives you what is known as a 'Flight level'.