Must I recalibrate my Victorinox Altimeter everyday?

Question

It's hard to find spots of known altitude, unless I go to the beach where it's sea-level. Besides, it's troublesome to have to recalibrate it everyday due to fluctuations in air pressure. Any expedients?

Answer 1

I am afraid you have to! And once a day is not a very good idea either!
In fact, local pressure can change rather rapidely, and, for an aircraft pilot, it is one of the most important instrument to keep calibrated at all times (especially if you fly low!)
As a walker or terrestrial individual, it is not so important, as what you want is more a relative indication of your altitude (x m ABOVE or below where you are).
Maps mark altitudes in relation to sea level under the standard atmosphere, so "0" level is 1013.25 millibars. You can use that and never calibrate your altimeter again. Your altitude would then be expressed in "Flight Level" (i.e. FL35 is 3500 feet above sea level in standard atmosphere).
I guess it is ok if you are stuck to the ground...

Answer 2

Victorinox Altimeter