2) if You Use This Compass Again This Semester
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Main the art of navigation, and you'll never use your way again. In our vii-part Backcountry Navigation form on Outside LEARN, you'll acquire everything you need to know to navigate on- and off-trail, from using GPS and digital maps to wayfinding the old-school way with a paper map and compass. Join the course now and learn at your own footstep.
Sure, not all who wander are lost. But when you've been walking in circles for hours and your 24-hour interval hike is stretching into an overnight, that saying is cold comfort. The solution? Don't get lost in the first identify. Learning how to utilise a map and compass is something all hikers and backpackers need to know.
Even experienced backpackers sometimes neglect their navigation skills, simply when the trail peters out or is covered by snow, knowing how to blaze your ain path is absolutely essential. And even in the age of GPS and smartphones, the most dependable way to brand sure that you stay on track is by carrying a map and compass and knowing how to apply them. Below, we'll cover both the basics and finer points of compass navigation.
More: Get unlost with our Backcountry Navigation grade on Outside Acquire
Why Should I Learn to Apply a Compass?
With the advent of GPS, navigating by compass has become something of a lost art. It'due south like shooting fish in a barrel to run across why: In articulate skies, modern GPS receivers tin decide a user's location accurately and chop-chop with little to no user skill necessary.
But here'southward the matter: GPS units are electronic, and electronics fail at the most inopportune times. Sometimes, they run out of battery; sometimes, later on years of use, they fail. Furthermore, they tin normally merely tell which way you're facing once you're on the move.
Compasses, on the other hand, are nigh-indestructible. They don't take batteries, don't take screens to break, and don't need software updates. When protected with either waterproof coatings or careful storage, maps rarely fail. Keeping these two simple items in your pack—and knowing how to use them—is a small pace that could salve you a lot of trouble.
Tip: Once yous've got the hang of navigating the erstwhile-schoolhouse way, you tin utilize apps like Gaia GPS to bank check your piece of work or get more specialized data like slope bending.
Get to Know Your Compass
A compass is the near reliable navigation method—but it's no good unless you know your way around information technology. Which parts your compass has depends largely on what kind y'all conduct. Here are some common components.
Parts of a compass
Baseplate: A articulate dorsum that lets you meet the map underneath. The ruled border helps with triangulation and taking your bearings.
Direction of travel arrow: This shows y'all where to point your compass when taking a begetting.
Index line: An extension of the direction of travel pointer that indicates where to read bearings.
Rotating bezel: A round expanse marked with number degrees from (clockwise) 0 to 360.
Magnetized needle: Located inside of the bezel, it always points to magnetic north, not true north. (They're hundreds of miles autonomously.)
Orienting arrow: It helps line the bezel upwards with the directions on the map.
Declination calibration: Hash marks on the inside of the bezel that are designed to assist adjust declination. (Don't know how to practice that? Read on.)
Correcting for Declination
One of the tricky parts of navigating with a compass is that magnetic due north isn't the same every bit true due north. The bending between the two—known equally the declination—varies depending on your location. It also gradually changes over time as the Globe's tectonic plates shift. If you don't adjust your compass to compensate, you'll find yourself headed in the wrong direction.
The easiest way to detect the bending of declination is to cheque your map: virtually have declination diagrams, forth with the date information technology was last revised. Because declination changes over fourth dimension, newer maps will have more than accurate figures. In that location should be an bending and a management—for example, eight degrees eastward.
Working off an older map? Check online. In that location are several different services that tin can use the location you'll be hiking in to calculate your declination.
Once you have your declination, subtract it from your compass bearing for w and add it for east. If you take trouble remembering that rule, try this mnemonic: Maps Tell Near Everything. (Translation: Magnetic to True: Add East.)
What Are the Different Types of Compasses?
While at that place are many different kinds of compasses on the market, the most common for backpackers is the baseplate compass, which consists of a liquid-filled compass face fastened to a flat, clear piece of plastic. Besides existence cheap and unproblematic, baseplate compasses' see-through design makes them piece of cake to use with a map.
The Suunto M-three NH is a solid baseplate compass for beginners and experienced orienteers alike. Buy Now
Too pop are lensatic compasses, which flip open like a locket and use a sighting wire in the encompass and a rear lens to accept highly accurate bearings. While they have the advantage of existence precise and durable, lensatic compasses accept a slightly college learning curve.
Our digital editor, a die-difficult fan of lensatic compasses, recommends the Brunton Model 9077, a archetype, durable military-style compass that volition last for year. Buy At present
Because baseplate compasses are the near widely used, our instructions hither volition focus on them. If yous have a lensatic compass, your steps may vary slightly. Metallic interferes with compasses' magnetic needles, so avert spreading your map out on a machine hood.
How to Find Your Location with a Compass
Figuring out your location with a map and compass is easy, but information technology comes with some caveats. First, you'll demand to be able to find at least two known landmarks. (Mountains and lakes are both good choices.) If yous tin can find a third, even better. As always, call back to adjust for declination
1. Using your compass, orient your map so that north is pointing to truthful north. (Pro tip: make sure the stock-still filigree lines on your compass line up with the north-south grid lines on your map.)
2. Take a bearing on your first landmark: Line up your management of travel arrow with your landmark, and then rotate the bezel until the needle lines up with the markings for north. (The number next to the index line is your bearing.)
three. On the map, identify i corner of your compass's straightedge on the landmark, the rotate the unabridged compass until the needle lines up with north on the bezel. Using a pencil, draw a line across the border.
4. Echo steps 2 and 3 for your other landmarks. The bespeak where all the lines intersect is your approximate location.
How to Find Your Bearings With a Compass
If you already know your location, y'all can utilise your compass to effigy out how to become to any point on your map. After adjusting your compass for declination, start by orienting your map to true north, as in the previous case.
1. Place the corner of your compass's baseplate on your location, then rotate your entire compass until the straightedge forms a line between your location and your destination.
2. Rotate the bezel until the grid lines on the base plate match the grid lines on the map.
3. Read the number next to the index line—this is your bearing.
4. Holding the compass level in forepart of yous, plough your trunk until the north arrow on the bezel matches up with the compass's needle. Your direction of travel arrow should now be pointing towards your destination.
Using Your Smartphone as a Compass
Your smartphone can do everything else, so it shouldn't come equally a surprise that it has a compass built into information technology. With the right app (try Digital Field Compass for Android, or for a more full-featured experience, Gaia GPS for iPhone and Android), yous tin can use your telephone as a navigation device, no GPS required.
The apps use your telephone'due south magnetometer. After a simple calibration process, information technology can not only exercise any a compass tin practise, merely tin can even lock onto a bearing well plenty to tell y'all when yous've gone astray.
Of course, phone-based compasses come up with a few big cautionary notes. The biggest? Simply like the GPS on your telephone, all of these apps require a charged battery to work. That's why we recommend that anybody learn how to use a normal, analog compass: Yous can count on it continuing to work no matter what you put it through. Once y'all've fully developed those skills, you tin use your phone's GPS without fear of running out of juice.
Looking for a high-tech app as a companion to your newfound compass skills? Outside+ members get a premium membership to Gaia GPS.
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Source: https://www.backpacker.com/skills/navigation/how-to-use-a-compass/
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