Some Basic Global Positioning System Considerations

Global Positioning System (GPS) technology for hunting and outdoor navigation is a wonderful tool to use as primary navigation or as a layer of redundancy along with other navigation tools such as your general orientation/awareness, topographic paper maps, compass, and Lat/Long or UTM scales.

A GPS unit can naturally be used alone to navigate back to a particular starting point or to a pre-saved location without the use of other supporting equipment.  If you need to travel to a specific location on a map by first plotting and reading the position coordinates from the map and then using the GPS to navigate, then some supporting items, such as those previously mentioned, would be useful.  By referring to a map, I mean a hardcopy as opposed to a GPS loaded topographic map.

GPS users have varying levels of experience and needs but for many, using the more basic functions are all that is often needed.  These basic functions might consist of just initializing the GPS unit, saving and naming a waypoint, and of course using the go to feature.     

I have had the opportunity to utilize many different brands of both handheld as well as consol mounted marine GPS units.  There are many excellent brands available.  What can make some units standout over others are various features such as being waterproof, having electronic compasses, barometric altimeters, color displays, built-in basemaps, data card capability, and optional map software capability. 

Other areas for comparison of GPS units might include the number of waypoints, routes, and tracks allowed within the track log.  If all this sounds confusing, remember that many of these areas for comparison purposes are not necessarily the most important areas for concern. 

One of the most important variables when comparing GPS receivers is how well they receive and lock-on to satellites and then hold that lock when moving through tree cover, brush, or canyons.  In my opinion, the GPS unit that comes with an abundance of features is not much more useful than being a weight on a throw cord to keep your food away from bears if it can’t lock and hold satellites in difficult terrain.  When comparing units, note the number of channels that the unit can track simultaneously, accuracy is an important performance consideration, and external antennas are also a valuable option for units that will be used in situations where open sky is limited.

When I hunt with friends, we frequently compare our GPS units side by side while moving through dense foliage and heavy canopy to better understand which units are performing better than others.  All GPS units are not created equal in their ability to acquire and hold satellites.  When you start researching and comparing GPS units to replace an older model, make certain that you scrutinize product evaluations and note the models of units that lock and hold those satellites the best. 

I have replaced my GPS units many times over the years and have always been happy with the upgrades in performance or additional features gained with the replacement unit.   My current GPS is the Garmin GPSMAP®60CSX.  I have been very happy with this unit’s performance in the most difficult of terrain.  Eventually something will probably come along that I will like better but for now this is just what I need.  Remember to practice with your unit on your training hikes and it might also be helpful to bring along a copy of the units field guide as you learn all the features that are important to you.