Hey guys, happy weekend! Just was wondering how often you reset/calibrate your altimeter n barometer on your Suunto's specifically the Ambit but I"m curious about other models as well. Yesterday I checked in on my local weather website n plugged in the current barometer readings of the day which were 29.90 just to make sure everything was right before I left for the day. I headed out into the city came home to find it remained the same at 29.90. Woke up this morning and checked in with my local weather n the Ambit was still reading 29.90 but current local readings was 29.82. Also, the altitude changed by 100 feet when I got home. I was all over the place yesterday, in Jersey, in towers in Manhattan and below sea level in the tunnel but living close to the city the temperature n weather conditions were pretty much steady wherever I went. So would it be normal for the alt/barometer to get "confused" with all the places I have been through out the day and normally need calibration for the next venture out the door? So it seems to me if you want accurate readings, would it be necessary to find points to calibrate when at various altitudes n locations all day long?