An altimeter is an altitude-measuring device that detects the changes in air pressure to display your altitude or height above sea level. It benefits mountain climbers, pilots, and extreme adventure seekers who monitor their elevation. As one goes up the elevation, the pressure in the air decreases, and that is measured by the altimeter in terms of altitude. The safety and navigation in such terrain are improved with this feature.
Many outdoor watches have altimeters combined with barometers and compasses, which completes a package for any outing into high-altitude environments or travel through differing elevations.
