Showing posts with label GPS. Show all posts
Showing posts with label GPS. Show all posts

Tuesday, July 13, 2010

Keep Your Bearings and Find Your Way In the Woods

It’s the time of year where many people head out into the woods and mountains to do a bit of camping, hiking, and just get away from it all for a while.

Like many other things, a bit of planning and preparation goes a long way towards ensuring that you won’t become disoriented out in the wilderness. Get familiar with the terrain before you head out. Study maps of the area you will be in, making note of any prominent landmarks such as railroad tracks, power lines, creeks, rivers, hills and valleys. If you find yourself turned around you can use these landmarks to find your way back to familiar terrain. My siblings and I used techniques such as this when out exploring on the 1,200 acre ranch we grew up on. That amount of land is easy for an 8 year old to get lost on, but whenever I found myself disoriented I could simply walk around until I spotted a power line and then follow it back to the road, ranch house, or one of the barns.

If you’re heading out into the woods, even if you’ll just be taking a small 30 minute hike, take along a basic survival kit including a compass or GPS. Many people who found themselves lost in the wild had only taken a few steps off of a trail when they found they were unable to find their way back. Without any means of navigation, it’s all too easy for a quick walk in the park to become a life threatening situation. Even seasoned outdoorsmen can find themselves disoriented when weather such as heavy snow, fog, or rain makes visibility limited.

If you choose to carry a GPS, make sure you’ve got spare batteries for it as well. If you carry a compass, make sure that you know how to use it in conjunction with a map. The best maps for navigating outdoors are 1:24,000 scale 7.5-minute topographic maps available from the U.S. Geological Survey. They are available online for a small fee at USGS.gov

The best way to prevent getting lost while out hiking in the wilderness is to keep an eye on landmarks and pay close attention to where you’ve been, where you are, and where you’re heading. If you’re simply hiking a trail, this may be as simple as looking for curves and elevation changes on the trail that match what is indicated on the map. If you leave established trails, take a bearing or track your progress with a GPS device to ensure that you can find your way back to your last known position. Take careful note of landmarks you can use to guide yourself back to the trail. As you walk, periodically turn around so that you can see what the path you are taking looks like from the opposite direction.

Should you become lost, or suspect that you are, take a break, sit down, and relax. It’s very easy to give in to the panic that sets in as you become more and more convinced that you are lost. Instead, sit down and have a bite to eat if you’ve brought some food or a snack. If you have one, take out your GPS or compass and map and take a bearing. Mentally retrace your steps and the path that you took. Often times calmly reviewing what you did and where you went before you got lost is all you need to do to be able to find your way back.

If you don’t have a compass or GPS, use landmarks, the position of the sun, moon, or northern star to orient yourself. When this fails, it’s time to use whatever else you have at your disposal to find your way back to civilization. Even if you are stuck without a compass or GPS, you can still certain tried and true methods to find your way. One older method for navigating unknown terrain is to follow rivers and streams. Humans build most of our settlements along waterways. If you find yourself lost, one sure fire way to eventually work your way back to a town or city is to head downhill. Continue moving downhill until you come across a stream, creek, or other waterway. Follow this waterway and you are assured of coming across a bridge or human settlement sooner or later. Just bear in mind, if you’re truly out in the wilderness that “later” may mean days or even weeks before a meandering waterway eventually brings you to a rescue point, making this a choice you generally only want to use when you have exhausted all other options.

If you do have a compass, GPS, or other navigational aid, you are in a much better position. Hopefully you made preparations before heading out and know the general direction to take to find your way back. Even though your compass may tell you to go in a direction that does not seem correct, you should always trust your compass or GPS. Remember: you’re the one that’s lost. A compass rarely deviates from magnetic north. A critical mistake many people make when they are disoriented is refusing to follow their compass or other navigational instruments. Even trained pilots have been known to ignore a compass reading and instead trust their gut, often leading to disastrous consequences. While GPS readings can be less accurate under cloudy skies or a very leafy canopy, even under these conditions your GPS will give you a fairly accurate path as you travel: usually accurate enough to find your way back. If you’re going to be out in the wild for a couple of days, it’s best to conserve your batteries and use the GPS in conjunction with a map and compass. Paired up with a USGS topographical map, this makes it easy to use the GPS to get precise latitude and longitudinal coordinates that you can mark on the topo map.

When setting out, I mark the position of my vehicle or trail head. Then, using the compass and map I navigate along the trail or through the countryside, stopping periodically to take the GPS back out and turn it on long enough to get another set of coordinates which are then plotted on the map. If I’m navigating a dense forest, such as I am forced to do when making my way to my deer stand during hunting season, I use fluorescent or reflective trail markers. Tied on a tree every hundred feet or so, depending on the visibility in the brush, these markers make it easy to find your way even under low light conditions. I use these paired up with a red LED headlamp to find my way in the wee hours of the morning, even in heavy fog, to navigate back and forth between camp and my hunting position.

Even if you’re prone to getting lost or turned around, with just a little bit of preparation you can be confident in your ability to navigate in the wilderness. Always make sure to tell a close friend or family member where you’re going, how long you plan on being gone, and when you expect to return. This way if you don’t return when expected your friend or family can alert rescue teams. Make sure to pack an emergency survival kit including first aid supplies and a compass or other navigational aid, even if you only plan on being out for an hour or so. Practice navigation and orienteering to improve your skills and keep them sharp. With enough practice and preparation, even if you do manage to get lost for a few hours or even day or so, it will be nothing more than a bit of an adventure that leaves you with some stories to tell around the campfire.

Friday, March 5, 2010

Geocaching

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Hunting seasons are generally pretty short, but that's no reason that you can't go out into the woods and have fun the rest of the year. In addition to land maintenance, scouting and practicing your woodcraft skills, there is a relatively new form of outdoor activity that combines the social aspect of the internet with the fun of adventuring through the woods. Of course, I'm talking about the GPS based sport known as Geocaching.

GPS devices aren't just for navigating your car. As the price of a handheld GPS unit continues to fall, geocaching is rapidly becoming one of the more popular outdoor sports, and nearly anyone can participate in it. Geocaching involves hunting for caches that have been hidden by other geocachers in interesting or scenic locations. For the most part, it's not a competition, though some participants like to be the "First-to-Find" newly hidden geocaches. It's an activity that is suitable for all ages, and the only equipment required to participate is a GPS unit and internet access.

Garmin RinoInternet access is necessary to reach the geocaching.com website. You can register for free at geocaching.com where you will be able to locate the coordinates for caches near you or around your destination and download them to your computer or GPS device.

The other thing you'll need is, of course, a handheld GPS unit. Almost any GPS device will work, and there are many to choose from. The Garmin eTrex H model is a great entry level GPS unit. It's waterproof, has a long 22 hour battery life, and is incredibly durable. It doesn't have all the nifty bells and whistles of the more expensive models, but it does have all you need to effectively find your way. Of course, there are nicer units out there. The Garmin Rino GPS unit combines GMRS or FRS radios with a very advanced GPS unit. With the Rino, you can team up with other people using similar units and share your location on the map display. Of course, even if your buddy doesn't have a Rino device, you can still use the radio feature with any FRS or GMRS compatible radio system.

Not all caches are created equal. Some are located in remote locations that have rough terrain and require searchers to hike miles over rough terrain in order to locate the cache, while others are easy to find in urban locations. There are probably dozens of geocaches within a couple of miles from your own home! Geocaching.com recommends carrying a small printout that describes geocaching when searching for a cache in a highly trafficked area, just in case local authorities find your activity suspicious.

Geocaching is also a fantastic way to work on your orienteering skills and practice using a map and compass. GPS units are fantastic devices, but they still require batteries, a clear view of the sky and a functional satellite network in order to work properly. Lose any one of these three things and you're stuck using a traditional map and compass. I like to use geocaching as an opportunity to improve my skills navigating using a map and compass alone. With a USGS topographical map you can plot the approximate location of the cache and plan your route into the area using basic orienteering skills and then utilize the GPS unit to zero in on the precise location.

So dust off those hiking boots, load up the day pack and head out! Whether you're just out enjoying nature, or hunting a well hidden geocache, a handheld GPS unit is a great little tool to have when you're out in the field.