>>596586>Things like barometer, thermometer, compass etc... have been proven unreliable Obviously if not properly calibrated and used. Which is why you can read the manual which states in length how to calibrate it.
A barometer/altimeter should be calibrated on the day of departure at a known altitude, and then again as often as you can, on every landmark whose altitude is known. Same goes with any altimeter, really, those things aren't magical.
Thermometers are generally reliable, but not on your wrist, because of your body heat. Once taken off, it'll be as accurate as any thermometer.
Electronic compasses need to be calibrated aswell, as they are much more sensible to local perturbations unlike a needle compass. They thus need to be calibrated for the area, and considering it takes 30 seconds, and the increase in accuracy, better do it once a day. They won't be very reliable in cities in general, and they won't work in a car- neither do 99% of needle compasses actually, stay at least 10 meters from any car to get a precise bearing.
They're all great tools, given you know how to use them, and know their limitations. Too many armchair survivalists buy Protreks only to complain they can't find their bus stop, and that it's not as good as their GPS. Obviously. But then that's why they make GPS watches now. Good old baro/thermo/compass watches are great because they pack a largely superior battery life, work regardless of GPS coverage, are way more affordable, and will be just as good if properly used, but not every retard can use one.
