Now draw the bearing line using the edge of the compass, and extending it in the desired direction. If youre in the Adirondacks, add 14 degrees to get a correct bearing of 194 degrees. Line your orienteering compasss base plate up with the maps north-south lines. Method #1. This is commonly known as puttingthe red in the shed. Turn your entire body as a unit until your predetermined azimuth falls under the fixed black index line. Your email address will not be published. If the magnetic declinationin your area were zero, you'd proceed in the direction of 062 degrees. You need to know where youre going before toying with the compass. Place compass on top of map. Visit our corporate site (opens in new tab). There's another way to orientate a map using a compass that starts slightly differently to what was explained above. Your map (and yourself) are now be orientated north. Map Reading and Land Navigation: FM 3-25.26. Uses a retractable lens to read the bearing while. You have your point location when you know precisely where you are in reference to your map. To prevent this issue, well tweak our compass to account for declination. The techniques employed when using the lensatic compass are as follows: a. How can you get your point position then? We'll start from the beginning, and go through everything you need to know to find your way over the terrain. Dont worry that your red orientating arrow doesnt point exactly map north. That can make a huge difference! True north is represented by a star. Sometimes we may use GPS technology or navigational apps to find our way, but we will always have the option of a map and compass stashed safely in our hiking backpack. 2. 3. (1) Take the straightedge on the left side of the compass and place it alongside the north-south grid line with the cover of the compass pointing toward the top of the map. To figure out precisely where you are on the map, you simply need one more piece of information. Most people have never heard of them, but soon enough, youre going to be a master at using them. You cant see the end point in your terrain, so you cant shoot a bearing on it. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); What is a Lensatic Compass and How to Use Them? Before we can start actually navigating, which well get to in Part IIIof this series, we still need to learnwhere we are in relation to our maphow to orient ourselves. With our compass adjusted for local declination, were now ready to start orienting ourselves. Take a bearing to a visible landmark using your compass. It has its advantages and disadvantages over the orienteering compass. Lay your compass on the map and line up its edge with a known landmark. The U.S. military M-1950 lensatic compass shown in this video is still in use today. Compass (For Dummies) Beginner guide to map and compass - Survival Saturday Ep. 1. So, if you know where you are on the map, look ahead and see what features you can see. Shows how to use the USGI issue lensatic compass to orient the map, plot a course based on two well-defined. Regardless, let's break it down into several steps: Open the compass cover at a 90-degree angle and then set the lens bracket at a 30-degree angle. Then turn the map until the position of the landmarks on the map corresponds to the real-world features in the terrain, then cross-check your position with additional features to ensure you have oriented correctly. To find directions from your map, you're going to need a protractor, a special instrument used for measuring angles. Basically, the compass needle will point someplace east of true north in locations west of the agonic line, whereas it will point somewhere west of true north in areas east of the agonic line. To use the terrain to orient a map, you must be familiar with symbols used on the map. (Note: Ignore the magnetic compass needle. 1. Orient a map using a lensatic compass Look at the red needle to see which direction it is pointing. Open the cover completely and pull back the rear sight. Turn the compass and the map as a unit until you box the needlei.e., Put Red Fred in the shed. Sounds like a lot more than a regular compass, doesnt it? Triangulate your position. In your case, however, your declination is 004 degrees West, meaning you'll have to add 004 degrees before you set your compass. You notice another mountain peak out in the distance, but you dont know what its called. Huzzah! Home / Educational Resources / Math Resources / Compass: Definitions and Examples. My 159-page, fully illustrated book is yours for the asking. Method #2. Align the map so that the top of the map is parallel with the direction north based on the compass. Its 310 degrees in reference to you, as you can see. This webpage may also be used to get current declinations. Then tilt the mirror until you can see straight down into the bezel. Orient you compass with the bearing, and draw the bearing line. 2. Sometimes limited visibility means terrain features may not be visible. It will be clearer why we need to compensate for declination in the first place. There are step-by-step to use a compass. Check the declination of your local location on your map or on a website. The orient a map to the ground by map-terrain association is one of the most basic skills that you will need in order to survive. You can use it to find your bearings in any direction you need to go. ), but youre not sure where. When you have a line location, you know youre on a maps recognizable line (trail, ridge line, etc. 8; Page 11 G. LOCATING POSITION USING INTERSECTION 1. Huzzah! 3. Keep it in a case, or wrapped up in a thick cloth to prevent those damages. The Lensatic compass is used to determine 'azimuths' or 'compass bearings' (horizontal angles). There you go. c. There are two methods of holding the lensatic compass and sighting. Take your compass and line up the edges with the north-south gridlines on your map. Now were going to find out where exactly we are on that line. Look at your map, or use a website to see your local areas declination. Your compass is now set. So, if youre in Muir Woods and your compass has a bearing of 180, youll want to subtract 14. ","acceptedAnswer":{"@type":"Answer","text":"A: You can use the arrow keys, or you can hold down shift and move in any direction to rotate a map around its axis. Best Camping Knife for Outdoor Adventures, Best 4-Person Tent For Camping [2023 Update], How to Use a Fire Starter: A Simple, Step-by-Step Guide, How to Dispose of Butane Cans (and Other Solvents), Best Hikes in Colorado: 17 Incredible Trails, Types of Backpacks: The Ultimate List of 23 Pack Styles, Learning one of land navigations primary skills, Turn your map using your map and compass together, How to check your map is oriented correctly. With your bezel ring set, stand at your starting point and . Sight an azimuth to any visible terrain feature that appears on the map. You should then be able to roughly work out which way is north, east south or west using your maps gridlines. Orienting the Map with anOrienteering Compass. Next, turn the compass housing so that the index pointer corresponds to the number of degrees of the magnetic declination. Remember declination from Part I? If your local declination is east of the agonic line, youll need to add the declination to your compass bearing; if its west of the agonic line, youll need to remove the declination from your compass bearing. The instructions on this page might make orienting a map seem a highly technical thing. The how to orient a map using a compass is a skill that can be used in the outdoors. Doing that with a lensatic compass is much like doing that with any other compass. Put the compass anywhere on top of the map. Making sure you don't move to change directions, turn the glass compass housing until the short luminous line is directly lined up with the luminous magnetic arrow. Designate your starting and ending points on the map. Place the compass flat on the map with the travel arrow pointed in the general direction of north and one of the base plate's long edges linking your location and your destination; you may need a straight-edge to make the connection, depending on the map's scale and the distance to be covered. The base is the compass dial, bezel, and the thumb loopthe thumb loop is used for stability to garner a more accurate reading. Place the three remaining fingers below as if you are holding a gun. Advnture is part of Future US Inc, an international media group and leading digital publisher. There are 2 ways to do this - using landmarks or using a compass. This is because it is prepped to point instead to magnetic north once it's lined up with your compass needle. Youll see that it shows two arrows when you turn your headset or controllers around to show the new orientation of a map. Ensure that the compass bezel is set to 0 degrees i.e. Wrap your middle, ring and pinky finger around your thumb for support. My magnetic declination is 4E, so Ill be moving the black arrow outline towards the red hash marks that are going towards E DECL.. How To Get Your Map and Compass To Face the Same Direction. To orient the map, first: Line up the edge of the compass with the edge of the map, or. The following 30-minute U.S. Army training video from 1966 shows how to find your direction, orientation, and location with a mil-spec lensatic compass. You can use this feature to set your compass in the dark. Conversely, the black end of the compass needle should be pointing south. The United States military needs to know how to navigate on land when all digital systems fail. Identify where you are on the map and place the compass edge over this location. Step 2: Line up your lensatic compass with the North Star and make sure the index mark is on the star. You should be able to turn the map so that if you were to imagine jumping into it, the features would lie in the same direction both on the map and in your surroundings. The lensatic compass must always be held level and firm when sighting on an object and reading an azimuth. 4. He is currently working towards qualifying as a Mountaineering and Climbing Instructor and International Mountain Leader. To orient a map means to line it up with the terrain, so that North on the map is pointing to North on the terrain. Line it up with that. Your lens piece will appear just above your thumb loop. Its declination would be written as 14E.
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