Make sure the direction of travel arrow is pointing to the spot that youre trying to get to. Identify your approximate location on your map. The map is now oriented to the terrain. So, if youre at Muir Woods and your compass reads 180 degrees, subtract 14 degrees. When moisture seeps into the lens case of your lensatic compass, it causes major problems. The two basic techniques for using the lensatic compass . He is currently working towards qualifying as a Mountaineering and Climbing Instructor and International Mountain Leader. Where the line intersects with the highway is where you are on the map. This makes it easier to relate what you see on the map with what you see on the ground. The lensatic compass is used by the U.S. Military. Standard compasses use floating dials, but lensatic compasses use a damping mechanism powered by electromagnetic induction. ), you just dont know exactly where. The compass baseplates edge is now pointed in the direction of the visible landmark you used to get your bearing. Compass adjusted for declination. This visualization has been approved for public release.Storyboard developed from the STP 21-1 Soldier's Manual of Common Tasks Warrior Skills Level 1, September 2017Approved by the Center for Initial Military Training (CIMT) G-3/5/7, Initial Entry Training, Fort Eustis Virginia. 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. A compass is a device used for navigation and orientation. The U.S. military M-1950 lensatic compass shown in this video is still in use today. A lensatic compass is often referred to as a military compass, and is typically used by the U.S. Military. 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. Declination was taken into account while adjusting the compass. When you point your compass towards true north, the needle will point slightly east. We know were someplace south of Saddle Mountain on HW 115. When you purchase through links on our site, we may earn an affiliate commission. Well use the rear bearing of it to draw a line on the map from Saddle Mountain to our approximate direction. Holding any compass in a slack and half-a**ed (that's an old military term. Learn Land Navigation Now. The courses of streams change, field boundaries move, new hedgerows are built, walls are plundered for buildings, glaciers melt, roads and bridges are washed away by floods, houses are knocked down and rebuilt somewhere else. Pull your elbows firmly into your sides; this will place the compass between your chin and your belt. Housing lines should be parallel to the vertical grid lines on the map. Find two or three easily identifiable features or landmarks on your map and then try to identify them in the terrain, or vice-versa. Reserve! When you face true north, magnetic north is roughly 14 degrees to the left, or west, of you. Holding any compass in a slack and half-a**ed (that's an old military term) manner can cause you to go off in the wrong direction. Turn the map and compass together until the azimuth sighted lies under the Index Line. Triangulate your position. Use the illustration above to familiarize yourself with the components of a lensatic compass. You now have your target's bearing. Hold the compass with your thumb fully in the thumb ring, and your index finger wrapped around and gripping the circular part of the underneath of the compass's base. The Art of Manliness participates in affiliate marketing programs, which means we get paid commissions on editorially chosen products purchased through our links. 4. Now were going to find out where exactly we are on that line. You can use it to find your bearings in any direction you need to go. Line it up with that. 3. You can also use this website to get up to date declinations. All you have to do now is take a bearing towards the unnamed mountain. A visualization depicting the Soldiers Manual of Common Tasks (STP 21-1-SMCT) task Orient a Map Using a Lensatic Compass (071-COM-1011). There are step-by-step to use a compass. The big bang. Orient your map so that its lined up with magnetic north (see above). Turn your compass on its side. To use the terrain to orient a map, you must be familiar with symbols used on the map. There's another way to orientate a map using a compass that starts slightly differently to what was explained above. You can always orient your map with a working compass. Place your compass base plate on your map so the edge of the compass is aligned with the north-south meridian lines. But its important to understand the different types of navigational toolsincluding a lensatic compass. Turn the compass dial so that the bearing intersects the index line (2). Its 230 degrees in reference to your position, as you can see. Shoot the reverse bearing you got with your compass from the top of Saddle Mountain on your map. Doing that with a lensatic compass is much like doing that with any other compass. Kierans bookClimbing the Wallsan exploration of the mental health benefits of climbing, mountaineering, and the great outdoorsis scheduled for release by Simon & Schuster in April 2021. Turn the compass and the map as a unit until you box the needlei.e., Put Red Fred in the shed. orient a map to the ground by map-terrain association, Sunday Firesides: Become an Evangelist . To begin, use your compass to locate a peak on Saddle Mountain. 2. 3. relation to a map. Place map on flat surface (not metal) 2. You cant shoot a bearing on the end point in your terrain since you cant see it. With the thumb loop all the way down under the compass, put the thumb of one hand all the way inside the loop, and place the index finger of that same hand along one side of the compass. Make sure the travel direction arrow is pointed in the direction you want to go. The fact that they glow in the dark (especially, if they're the tritium kind which will glow for years without having to be exposed to light) means you can use your compass without a light for night navigation. The instructions on this page might make orienting a map seem a highly technical thing. Take a bearing on the mountain thats southwest from you. 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); MyOpenCountry is a participant in the Amazon Services LLC Associates Program. But it isnt just magnets there are other culprits at play, here. With solid land-navigation skills, you'll be more confident and "at home" in the wilderness. For this task, the lensatic compass really shines. Line your orienteering compasss base plate up with the maps north-south lines. SMCT Orient a Map Using a Lensatic Compass. Orienting the Map with an Orienteering 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. Yeah, book is the most effective tool that can be made use of for affecting your life. Its declination is recorded as 14E. This is also known as triangulation. Aligned the side of the compass with one of the north-south grid lines. Open the cover completely and pull back the rear sight. Take your compass and turn the compass housing (bezel) until the red orientating arrow is in line with the direction of travel arrow. The My Open Country name is registered with the U.S. Patent and Trademark Office. If you want to learn Land Navigation in detail, either buy a book; or get someone, who has the knowledge and skills, to teach you in person. Move the lens holder: Slightly push forward the lens holder. The method is to align the edge of the compass along the Magnetic North (MN) line, and then move the map and compass together until the compass needle points north. But I wish I had the simpler kind that just automatically points to the direction on the compass that I am . We can find out easily enough, though. The variation between magnetic north and true north is currently so minor that this can generally be ignored. The how to orient a map using a compass is a skill that can be used in the outdoors. Now repeat step 3 above and youre good to go. Put that hand up to the compass, steadying the compass by placing your index finger along the compass's side, and wrapping your thumb between the bezel ring and the rear sight. Photo: Wikipedia. If you point your compass towards true north, your compass needle is going to point a little to the east. navigation and combat. Look through the sighting slot and find some target (a tree, boulder, whatever) that lines up with your sighting wire. Declination is the angle formed by true north and magnetic north. 4. My 159-page, fully illustrated book is yours for the asking. Lets say youre planning a short hike from one point to another. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); What is a Lensatic Compass and How to Use Them? PART 1 Basic Land Navigation Module 6 Map Information WARNING This presentation is intended as a quick summary, and not a comprehensive resource. 4. Next, without changing the orientation of you map, move your compass so that the point you are plotting to/from is under the sighting wire, and the compass dial reading matches your bearing. Thanks so much for sharing! Here at Brunton, we manufacture a variety of different compasses for varying needs in the field. A good temperature of 65F to 78 should keep the humidity down and help preserve the structural integrity of the compass. In this case, it 15 degrees positive (east). ","acceptedAnswer":{"@type":"Answer","text":"A: In order to orient and read a map, you have to have spatial awareness. This is a hard and fast guide on how to use your lensatic compass with a map, which is what it was designed for. {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How do you orient and read a map? Just follow these lensatic compass instructions: Open the compass: Let the cover and the base form a 90-degree angle. The lanyard hole that can be used by the orienteering compass user can limit access to the compass if not enough space is available to move the compass across your map. You learn that it has a 176 bearing. Determine the correct magnetic azimuth to the designated point within 3 degrees using the compass-to-cheek method, or within 10 degrees using the center-hold method. Throughout this procedure, were not utilizing it at all.). surface. Open the cover completely and pull back the rear sight. Assume youre in the Adirondack Mountains of New York. Huzzah! Well say the declination value is 10 degrees. Fortunately, orienting your map is simple. SEE IT. This was developed for the Center for Initial Military Training, FT Eustis, Va. Well, we can use our compass as a protractor to take a bearing from our map. Contours are king. Well, that is, unless you're doing something silly like holding the compass backwards. ), Set Your Compass for Your Intended Azimuth. Line up your map with what you see around you. Preferred by military for its precision and. Spatial awareness refers to having knowledge about where everything in the environment is located relative as well as understanding how objects relate with each other spatially. Ethan Allan thats the peak you saw. Most lensatic compasses are designed to withstand moisture to a certain extent, but nobody makes them perfect. As a result, its declination would be 14 degrees west. 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. A map and compass are useless unless you know how to use them properly. UK readers, youre in luck. Navigate to your map. Sometimes limited visibility means terrain features may not be visible. If you have already adjusted your compass for magnetic declination, your map is now oriented and youre good to go. For instance, line up roads, mountains, water towersany terrain features that stand out enough to make orienting the map possible. In the daytime, you'll normally find something in the distance on your azimuth and walk to it, so you don't have to keep staring at the compass. One advantage is it's probably more accurate when it comes to "shooting azimuths," meaning the act of determining the specific compass direction to a spot on the earth. Save my name, email, and website in this browser for the next time I comment. Let's say you see a water tower off in the distance. There is some technical difference between the two, but for all practical civilian purposes, the words are interchangeable. Sounds like a lot more than a regular compass, doesnt it? Orient a Map Using a Lensatic Compass 071-329-1011 Conditions: Standards: Orient the map to the ground using a compass. There are 2 ways to do this - using landmarks or using a compass. Center-hold. 5. Double-check by making sure the map title or legend text is the correct way up, or find the maps north arrow. This step comes after aligning our map and compass needle to magnetic north if using a compass that doesnt have a declination adjustment key. Most people have never heard of them, but soon enough, youre going to be a master at using them. number of degrees in a circle (360: north is 0 or 360, east is 90, south is 180, and. I guess the military needs the extra accuracy now and then say, for example, to precisely place artillery fire. You get the picture. Its a subtle difference, but its a roundabout way of saying lensatic compasses are less prone to interference than others. My magnetic declination is 4E, so Ill be moving the black arrow outline towards the red hash marks that are going towards E DECL.. Some of the components' terms are used in the explanations below. We may use the map to identify any landmark we observe in our landscape once we know our point location. What if you dont have access to a compass that can compensate for declination? Improve your reading skills with the KWL Method Compass 101 - How to Use a Baseplate Compass Buying a Compass for Land Naviga-tion Basic Navigation with a Compass and a Map How to orient a map and take a . ","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. 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. Return from Lensatic Compass to How to Use a Compass. Note that we will be moving and adjusting the compass on the map. At night, however, or in other periods of limited visibility (fog, blizzard, etc) keeping these two luminous bits lined up will be your only remedy. 4. 1. pointsnorth, east, south, and westbut some are marked additionally with the. 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. Lastly, the reading lens also helps cover the compass and folds out; this is where the term lensatic comes from. Align the map so that the top of the map is parallel with the direction north based on the compass. He has climbed a handful of 6000ers in the Himalayas, 4000ers in the Alps, 14ers in the US, and loves nothing more than a good long-distance wander in the wilderness. 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. 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. You want to know how to use a lensatic compass? 1. Now its time to use the lens. On your map, though, you can see the two spots. Huzzah! 4. Place the compass on your map with the edge along a north-south grid line. Read the azimuth: Lastly, ensuring the dial is floating, look down on it and read the azimuth. Corrected the orientations of the map when the G-M angle exceeded 3 degrees (50 mils) using one of the following: a. 4. Youre in the right place! The housing is marked with cardinal points, typically north, south, east, and west, which . Once you master using a lensatic compass, it becomes the only way youll ever navigate around the wilderness moving forward. No worries. Magnetic north lines up exactly when youre on this line and facing true north. So, don't sweat too much the minute details of getting your map finely oriented to the last degree with your compass. This straightforward video shows both approaches to using a compass to orientate a map: All the latest inspiration, tips and guides to help you plan your next Advnture! 5. 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. If your compass doesnt have a declination adjustment key, simply make the adjustment on the spot. Determine your position on the map and set the compass edge over it. 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. 3. PARTS OF THE LENSATIC COMPASS Compass, Lensatic, US Army, closeup: 2 (From another source) 1. 1. Thank you for signing up to Advnture. Draw a line towards the roadway youre on using the side of your compass. Set your compass dial to 000 degrees. When it comes to how to orientate a map, there are two main ways to do it. If you dont start out using your lensatic compass with a map, then its just a regular compass. Half the activity of their sport is keeping their map oriented so they can navigate faster and with more accuracy. It will be clearer why we need to compensate for declination in the first place. Remember, human features are the last port of call and, whats king again? With our compass adjusted for local declination, were now ready to start orienting ourselves. Ensure that the compass bezel is set to 0 degrees i.e. On the other hand, wrap the fingers around the three fingers below the compass. Turn the compass and the map as a unit until you box the needlei.e., Put Red Fred in the shed. Lay your compass on the map and line up its edge with a known landmark. You see that the mountain is 24 in relation to you. In addition to 360 degrees to measure directions in a circle, the military also uses 6,400 mils. A lensatic compass is just one of the many navigational tools we have built. He did this for ten days, taking us across numerous waterways and lakes. If the contour interval is 10 meters, then what is the change in elevation of each intermediate contour .
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