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Place the compass on your map with the edge along a north-south grid line. 1. 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. Hey, it happens! No worries. You want to know how to use a lensatic compass? References required related fm 3 2526 land navigation Lets break down the individual parts of a lensatic compass so you can understand every element behind how it works. Last update on 2023-03-04 / Affiliate links / Images from Amazon Product Advertising API. Make sure the travel direction arrow is pointed in the direction you want to go. Whether or not you participate in orienteering, I'm confident you'll find that a properly oriented map is a huge help in finding your way. To find the tower's bearing with your lensatic compass: 1. Using the side of your compass, draw a line towards the highway that youre on. But I wish I had the simpler kind that just automatically points to the direction on the compass that I am . Magnetic north lines up exactly when youre on this line and facing true north. He did this for ten days, taking us across numerous waterways and lakes. 071-COM-1011 (Orient a Map Using a Lensatic Compass) Now, rotate the map and compass baseplatetogetheruntil the compass needle is boxed in the red orienting arrow (or direction-of-travel lines) on the compass. A visualization depicting the Soldiers Manual of Common Tasks (STP 21-1-SMCT) task Orient a Map Using a Lensatic Compass (071-COM-1011). The lensatic compass is used by the U.S. Military. Most lensatic compasses are designed to withstand moisture to a certain extent, but nobody makes them perfect. 3. 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Were going to move that to take into account declination on our compass. Then, slide your compass around so that its edge passes through the landmark on the map, while the orienting arrow continues to point north. As long as you can hold the compass level and steady, the exact grip doesn't matter. It will be clearer why we need to compensate for declination in the first place. How to Orient a Map: Navigation 101 - My Open Country He climbs when he should be writing, writes when he should be sleeping, has fun always. 2. The first step in orienting ourselves with our map and compass is to double-check that north on the map corresponds to north in our landscape. Video: How to Use a Lensatic Compass (U.S. Army, 1966) Lets say youre out hiking. There are so many different kinds of compasses, it can be hard to keep up. Its 310 degrees in reference to you, as you can see. that it is pointing towards the top of the map. Put your compass on your map. Note that we will be moving and adjusting the compass on the map. Nothing is permanent and contours are more permanent than pretty much everything else on a map. So, don't sweat too much the minute details of getting your map finely oriented to the last degree with your compass. Take your compass and turn the compass housing (bezel) until the red orientating arrow is in line with the direction of travel arrow. Center-hold. It's important to hold your compass stable, squarely in front of you, and level. You then see where the line you drew intersects with the protractor's numbers, in this case 062 degrees. For this task, the lensatic compass really shines. Now it's time to take out the map. Using a little screwdriver or the metal piece that came with your compass lanyard, turn the small screw. Get How To Use A Lensatic Compass - US Legal Forms Move the lens holder: Slightly push forward the lens holder. Take a bearing on the mountain thats southwest from you. 4. Youve got your trusty compass and a map of the area, but you dont know exactly where you are in relation to the map. Pull the ring underneath the compass and put your thumb through. When you face true north, magnetic north is going to be left, or west, of you by about 14. Line your lensatic compasss base plate up with the maps north-south lines. 2. This step comes after aligning our map and compass needle to magnetic north if using a compass that doesnt have a declination adjustment key. Orienting, or aligning, the map is really easy with just 3 steps: Lay your map out on a relatively flat, smooth surface. Welcome back to the Art of ManlinessLand Navigation Manual. Lets say youre planning a short hike from one point to another. Open the cover completely and pull back the rear sight. In this guide, we will be covering the following: The first step to successful navigation with a map and compass in the backcountry is correctly orienting your map. Just follow these lensatic compass instructions: Open the compass: Let the cover and the base form a 90-degree angle. . Look directly down on the top (smaller card) of compass to view general orientation cardinal points. To make sure you receive a correct bearing, youll have to perform some arithmetic with all of your bearings. 3. How you can Read an Engineer Compass - Physics | ScienceBriefss.com Hold it square and straight in front of you like you mean business. 5. Hold compass up to eye level and view larger side card for "direction-of-travel" compass. What happens if you dont compensate for declination with your compass? Heres our step-by-step guide to the most straightforward. 4. Not a problem. You see that its 310 in relation to you. Without getting over-complicated, a standard compass is different from a lensatic compass. 3. A lensatic compass features a small pop-out area for your thumb, and a lid on top of the main compass body. 2. When your compass cant adjust for declination, you may make your own declination arrow out of masking tape and attach it below your compass under the right declination degree hash (This will only work if your compass has a clear base). Lay your compass on the map and line up its edge with a known landmark. Finally, read the number on the rim of the compass. Read Online Compass Reading Study Guide - ftp.avenza.com Step 4: Walk along the path and make sure your compass always points North. Sight an azimuth to any visible terrain feature that appears on the map. Next month, well wrap off our series with a final briefing on how to navigate using MGRS coordinates, exactly like the military. When you have a line position, you know that youre on some identifiable line on the map (trail, ridge line, etc. As mentioned in Part I, true north and magnetic north arent the same. Place the thumb of the other hand between the rear sight and the bezel ring; extend the index finger along the remaining side of the compass, and the remaining fingers around the fingers of the other hand. Instead of using your compasss arrow, youll align your needle with the tape arrow. Simply look for distinguishable landmarks that are marked on the map, and turn so that both you and the map are facing this object. To prevent this issue, well tweak our compass to account for declination. Where the second line intersects with the first is where youre at on the map, more or less. Make an "L" shape with the index finger and thumb of your other hand. west is 270). ), but youre not sure where. We just dont know where we are. SMCT Orient a Map Using a Lensatic Compass. When orienting a map, our aim is to position it so that the north-south grid lines on the map (eastings) are aligned north-south. With solid land-navigation skills, you'll be more confident and "at home" in the wilderness. The My Open Country name is registered with the U.S. Patent and Trademark Office. orient a map to the ground by map-terrain association, Sunday Firesides: Become an Evangelist . How to Use a Compass: 15 Steps (with Pictures) - wikiHow Next, without changing the orientation of you map, move your compass so that its edge is touching the point you are plotting to/from and the compass dial reading matches your bearing. 5. Orient the map to the terrain. My 159-page, fully illustrated book is yours for the asking. At that point, leave it out in a spot where it can really dry overnight until you know the internal components are no longer moist. On your map, shoot the back bearing that you just took with your compass from the top of Saddle Mountain. The compass baseplates edge is now pointed in the direction of the visible landmark you used to get your bearing. Turn the compass and the map as a unit until you box the needlei.e., Put Red Fred in the shed. 4. 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. If your local declination is east of the agonic line, youll need to add the declination to the bearing on your compass; if your local declination is west of the agonic line, youll subtract the declination from the bearing on your compass. Step 2: line the compass up with the map. On your map, though, you can see the two spots. 4. How To Use A Compass: The Ultimate Guide To Navigation By Ethan Shaw Preferred by military for its precision and. Flip up the lid to a 90-degree angle. You can figure this out with a little compass work. 5. First, use your compass to get a bearing on a peak of Saddle Mountain. Rotate the compass dial until north on the compass ring lines up with north on the map. Assume youve climbed to the top of Camels Hump in Vermont. What if youre not on a route and just have a broad idea of where you are? Steady the compass by allowing the hand holding the compass to rest in the cupped palm of your other hand. Lets return to Muir Woods as an example. 2. Step 1 Orient the map. Using the rotating bezel, turn it until the direction of travel arrow lines up with the north arrow. functional from -50F to 150F. If not, recalibrate before continuing. Place map on flat surface (not metal) 2. Find two or three easily identifiable features or landmarks on your map and then try to identify them in the terrain, or vice-versa. At this point, your map is almost oriented. Want to start taking action on the content you read on AoM? As magnetic north changes depending on where you are in the world, you have to ensure you adjust your compass accordingly. You just need one more piece of information to figure out exactly where you are on the map. Leave your orientating arrow in line with the index line and the direction of travel arrow, as it will already be primed to point magnetic north. Keep doing this until you get to where you want to go. 4. 3. slide 1 to 3 of 3. Check the declination of your local location on your map or on a website. Position of the point. Whenever the luminous magnetic arrow lines up with the luminous short line, you're following your intended azimuth. Adjust the compass bezel so that north on the compass corresponds to north on the map. In this video below,the user walks through the elements of a USGI lensatic compass, and how to properly use one. 2. to orient the map to find your position. Plotting a bearing on a map using a round lensatic compass - MapTools As previously stated, orientating your map using visual features is only as good as the visibility on any given day. How to Use a Lensatic Military Compass? - Let's Find Out! They both use magnetization to help you find where you are and where youre going, but theres a catch. Plot a line on the map using the back bearing from that mountain. Well, we can use our compass as a protractor to take a bearing from our map. 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. This is because it is prepped to point instead to magnetic north once it's lined up with your compass needle. Place your map in such a way that the terrain features line up with your maps features. You need to know where youre going before toying with the compass. You learn that it has a 176 bearing. Your compass is now set. Turn your entire body as a unit until your predetermined azimuth falls under the fixed black index line. We earn a commission if you click this link and make a purchase at no additional cost to you. Using your location as a pivot, rotate the compass until north on the bezel is pointing to the top of the map and the compass housing orienting lines are parallel with the map's vertical grid lines. Now draw the bearing line using the edge of the compass, and extending it in the desired direction. How to Pack a Backpack Are You Doing it Right? We may then use our compass to begin going in the direction we need to go in order to reach our destination. Magnetic north would be around 14 degrees to your right, or east. Boom. Orient your map so that its lined up with magnetic north (see above). Thats 130 degrees. Learn to navigate using a topographic map and a compass. How To Use a Compass with a USGS Topographic Map If your destination is further than what the side edging allows for, you can use an actual ruler to align with the side of your compass edge to help you get to your destination. 3. In your case, however, your declination is 004 degrees West, meaning you'll have to add 004 degrees before you set your compass. SEE IT. 4. Declination is the angle formed by true north and magnetic north. Oriented the map. You look out into the distance and you see another mountain peak, but you dont know the name of it. If you take just one thing from this guide, let it be the appreciation that contours are the most important navigational feature on the map, especially where hills and mountains are concerned. Here's an example from an older map of the Grand Canyon. Its one of the most versatile navigation tools we have available today. In my. While some elements of the navigation process are similar to using a baseplate compass, there are also slight differencesincluding how you hold a lensatic compass. Place your compass on your map with the edge of the baseplate parallel to the north-south meridians on the map. Youll line up your needle with the tape arrow instead of the arrow on your compass. So in this installment, well go over the skills you need to do just that. As we can see, the area Im in has a declination of 4E. You should notice that the direction of travel arrow should be pointing at the top of the map, and the black orienteering lines should also be parallel to the north-south gridlines on the map. Were ready to start orienting ourselves now that our compass has been corrected for local declination. how to orient a map using a lensatic compass - caketasviri.com When moisture seeps into the lens case of your lensatic compass, it causes major problems. durability, and its hyper-accuracy in land. Ethan Allan thats the peak you saw. So, how are you going to acquire your point position? You notice another mountain peak out in the distance, but you dont know what its called. One disadvantage is, unlike the orienteering compass, it's not easy to make it double as a protractor, meaning you'll have to carry a protractor with you. Casio's latest G-Shock watch could be a serious Garmin rival. Orient a map using a lensatic compass by Jessica Lanier 3. 2. Declination was taken into account while adjusting the compass. Aligned the side of the compass with one of the north-south grid lines. relation to a map. Picture 1: Map Declination. Lets say youve hiked the peak of Camels Hump in Vermont. 3.30 MB. Step 2: Line up your lensatic compass with the North Star and make sure the index mark is on the star. When you point your compass towards true north, your compass needle is going to point a little to the west. You cant shoot a bearing on the end point in your terrain since you cant see it. Place compass on top of map. My 159-page, fully illustrated book is yours for the asking. This is because it is prepped to point instead to magnetic north once its lined up with your compass needle. We may use the map to identify any landmark we observe in our landscape once we know our point location. Don't worry that your red orientating arrow doesn't point exactly map north. Another trick for declination when your compass cant adjust for it is to create your own declination arrow out of masking tape and tape it beneath your compass under the correct declination degree hash (This will only work if your compass has a clear base). The instructions on this page might make orienting a map seem a highly technical thing. For instance, line up roads, mountains, water towersany terrain features that stand out enough to make orienting the map possible. Home / Educational Resources / Math Resources / Compass: Definitions and Examples. 2. Place the fully opened lensatic compass on the map with How to Use a Lensatic Compass: Guide for Hikers How to Orient a Map - land navigation Before we do that, lets take a closer look at declination. Were headed to the Wichita Mountains Wildlife Refuge in Oklahoma for this example. Turn the compass and the map as a unit until the luminous magnetic arrow is directly under the fixed black line. The North-seeking arrow of the compass must fall within 3 degrees (50 mils) of the angle shown in the grid-magnetic (G-M) angle on the map's declination diagram. Reserve! Use your index finger to steady the front of the compass. Isnt that a little black arrow outline? Most compasses are marked with the four cardinal. Your map (and yourself) are now be orientated north. There are 2 ways to do this - using landmarks or using a compass. Kieran has taught mountaineering, ice climbing, and single-pitch and multi-pitch rock climbing in a variety of contexts over the years and has led trekking and mountaineering expeditions in the Alps, Rockies, and UK. In this situation, you can use your compass to work out which direction magnetic north is and orientate from there. Check to see if the north directional arrow is inline with the arrow/line of the compass. Look through the sighting slot and find some target (a tree, boulder, whatever) that lines up with your sighting wire. We'll start from the beginning, and go through everything you need to know to find your way over the terrain. Hold the compass steady and level, and up to your face. A good temperature of 65F to 78 should keep the humidity down and help preserve the structural integrity of the compass. Old-School Navigation: How to Use a Map and Compass 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. Return from Lensatic Compass to How to Use a Compass. At Advnture, we never head out into the backcountry without a map and compass. When this happens, its time to orientate using a compass. 5. The red end of the needle must be pointing to the top of the map. 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. EMERGENCY PREPAREDNESS & More: A Manual On Food Storage and Survival: 2nd Edition Revised and Updated. "}},{"@type":"Question","name":"How do you orient a map to ground? Some of the components' terms are used in the explanations below. When youre on this line and are facing true north, magnetic north lines up perfectly, too. Remember declination from Part I? To get among the sources, you can discover the fascinating point to acquire. The term lensatic comes from the fact that there is a lens on the rear side of the compass that aids in the orienteering process. Draw a line on the map at 130 degrees from Saddle Mountain.