Special Features:

Tracked by up to 12 gps satellites simultaneously; up to 15 hours of continuous operation on two aa batteries; 10 year lithium backup battery; large backlit display; rubber armored, impact resistant plastic; weather-proof

Properties:

A fixed number of components and/or items, not all having the same basic name, of a ground or airborne navigation set that acquires and tracks signals from a constellation of orbital satellites to obtain time and three-dimensional position and velocity directly or in conjunction with sub systems of the host vehicle. Excludes stand alone navigation systems, such as inertial navigation set.