Beyond basic GPS and time, this watch also includes a compass, a barometer and an altimeter.
The model features sport timing functions, which includes an altimeter and temperature gauge.
National Geographic Men's Hike Master Altimeter Temperature Digital Watch (Model NG701GKSU) - the National Geographic Echomaster is a high performance men's stainless steel digital watch.
In addition to the sturdy titanium case and polyurethane strap, this model offers a digital compass that updates on the fly, a 1,000 hour chronograph, weather barometer, altimeter, altitude alarms and a hydration alarm.
My American friend Keith Giles has one which includes an altimeter.