GPS Tips

GPS Tips

Tips on how to make the safest use of your GPS receiver

GPS Tips 

Key tips

The following are summary tips about how you can make make sure that you use your GPS unit responsibly and it works when you need it to

  • Always carry a compass and map for the area in which you will walk

  • Use the GPS to confirm your position as required, but not as your primary means of navigation, i.e. use your map & compass first

  • Check that the GPS datum is set to OSBG/OSGB36

  • Always make sure that you give your GPS unit a good chance of success, by giving it a clear and wide unobstructed view of the sky. Heavy tree cover can delay or prevent the unit obtaining a fix

  • Always switch on your GPS receiver before you start walking and leave it in one place as long you can. This ensures that the unit downloads the most up-to-date almanac data if required. Doing this will reduce the Time To First Fix (TTFF) if you need to use the GPS unit later in the day

  • Confirm a calculated grid reference to a known point from a map, i.e. your start position. 

  • Switch on the unit every couple of hours so that the ephemeris data remains valid, leading to a warm start when you may need the unit in an emergency

  • Always have a spare set of batteries, of the correct size, know how to change them and know when you last changed them