The Garmin GPS 12 set a new standard for compact performance when it was introduced in 1997, but today it’s the old man of the bunch. Placing it next to the other two makes the GPS 12 seem bulky, especially when compared to the eTrex. Garmin did increase its battery life from 12 hours to 24 hours, but the GPS 12 uses four AA batteries, so its battery consumption is roughly twice that of the eTrex and the Magellan 315.I’ve always liked the control layout of this model, however, which places all the buttons conveniently under your thumb and leaves the screen unobstructed. The navigation screens include a position-page display with all basic information on the current location, a map page that graphically displays track and icons and a compass-type navigation page.