A small lightweight GPS like the eTrex is easy to carry.

eTrexes are popular - compact, light and easy to use for recording positions.

Choose a GPS with electronic compass and barometric altimeter for extra navigation information. Plus you can get your bearings whilst stationary.

A GPS with mapping capability will show your position on the map on screen.

The basic eTrex is always extremely good value for money

Most new GPS are WAAS enabled for greater accuracy.

Garmin eTrex GPS are very easy to use. Satmap Active 10 are designed specifically for outdoor enthusiasts who want to enjoy the outdoors, not spend hours learning technology. The touchscreen Dakota and Oregan series have user-friendly intuitive interfaces.

Choose a robust unit with large buttons - the smaller models can be fiddly if you've got bigger hands.