handy gadget but....
Having an altimeter compass thermometer stopwatch clock and barometer all-in-one seems handy enough. The unit seems to work well with one exception; the instructions say it may take 3 hours for the barometer/altimeter to correct itself after flight.
My unit was delivered by air and when it arrived the pressure reading was a full 3 inHg below the local weather station (reading 27" rather than 30"). It took not 3 hours but a WEEK for it to slowly creep up so that now it reads about 0.3" below the local station. Not sure how confident I am with it's minute-to-minute variation and since it calculates altitude from this I wouldn't be skydiving with it...More detail ...
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