Originally Posted by
jefnvk
For those that have the computers with altitude, how do those actually work? Do you have to plug in barometric pressure to get a good reading, like an airplane, or how exactly are they calibrated?
You set an altitude on them during setup of the computer. The altitude is pretty easy to find now. The device then assumes that the barometric pressure is relatively stable. It isn't, of course, but I wouldn't go looking for 0.01 meter accuracy either. If it's anything like my barometric watch, the altitude is good for ±10 meters.