How does a GPS work?
A GPS works by receiving signals from three to four of the 30 GPS satellites orbiting the Earth. Signals from several satellites create a series of measured distances that let you know where you are on earth by giving you a set of coordinates on your GPS. This is called trilateration.
Each GPS unit has a specific operating system and datum setting that you must be familiar with before using the device.
General functions of GPS
A GPS unit has a variety of functions within its menu. These can be very useful to the modern hunter. Depending on the device you are using, these functions may include:
- mark a way point
- compass
- track log
- map
- two-way radio
- geotagging
- geocache.
The skill of outdoor navigation is knowing where you are, where you want to go and how to get there. Reading a map, using a map and compass together, and using a GPS to navigate are important skills to have when hunting.
The practice of looking at features on the map and identifying the same features on the ground is being replaced by the use of GPS, but the GPS should never be your only means of navigation and it should never replace the skills of reading a map and using a compass to navigate.
