Review Garmin gps
Packed with features and the same user-friendly operation that's made us the world's number one GPS manufacturer, the GPS 12 is the ideal handheld for outdoor adventurers or for the devoted mariner. The GPS 12 features fast satellite acquisition and performance that stays locked on in the toughest conditions, even in heavy tree cover.

The GARMIN GPS 12 Personal Navigator is an affordable 12 parallel channel GPS receiver with the reliability you've come to expect from GARMIN.
The GPS 12's rugged, waterproof case features military tough construction. Its rocker keypad design provides true one-hand operation to keep you on the move day or night, rain or shine. Add in a host of advanced navigation features like a moving map plotter that displays waypoint names, symbols or comments, proximity waypoint alarms, average and maximum speed data and trip timers, and you have all the things that make the GPS 12 a GARMIN -innovation, performance, and value.

What is GPS http://www.mncgroup.co.uk/gps/info.htm