By
eHow Electronics Editor
Difficulty: Moderately Easy
Step1
Consider the size of the unit. Do you want to slip a unit into your pocket? Various carrying cases are available.
Step2
Choose a system that has multi-parallel channels. This ensures that several satellites are tracking you at one time rather than just one. You get faster fixes in difficult conditions.
Step3
Select a system that can store 100 or more way points. These are geographic points that can be used as markers.
Step4
Pick a system that can give the distance and direction of a point from your current position.
Step5
Choose a system that can store several routes.
Step6
Pick a system that is capable of using UTM grid data maps or local grid maps. Make certain that the system can use the common datums used worldwide.
Step7
Make sure the unit is rugged and waterproof.
Step8
Make certain that it has a backlit display. This is essential if you intend to do your hiking or bike riding at night.
Step9
Make certain that the battery life of the unit is sufficient for your travels.
Step10
Have the salesperson show you how to work the unit and then work it yourself.
Comments
Anonymous said
on 11/22/2005 Don't forget your compass. It still works in bad weather, during sun flares, and when your GPS batteries die!
Anonymous said
on 11/22/2005 GPS systems generally don't give very good elevation readings. You're better off using a hand-held altimeter.