lensatic compass vs map compass

A compass is divided into a circle, which by definition has 360 degrees. 1 review. Definition of a . Found inside – Page 2-388TASK NUMBER : 071-329-1011 ORIENT A MAP USING A COMPASS CONDITIONS : Given a standard 1 : 50,000 scale military map and lensatic compass , in a field environment , under daylight conditions . STANDARDS : Within 1 minute , orient the map ... Hold the compass steady and turn the degree wheel to align the orienting arrow with the new needle position. Lensatic Compass. Definitely worth the extra tariff. Equipment you need for wherever your adventures in life take you. The red marks are in 5 degree increments, not as detailed as the typical backpacking compass. Can a 7-Year-Old Vehicle Bag Stand Up to Texas Heat? The first step is to always take a compass bearing. Now let’s start over and walk 15˚ west of North We will also draw a line for our starting point to where we would cross the circle. There are a set of small black numbers inside the red ring. The Tritium won't, but this can be replaced by Cammenga every 13 years or so. CAMMENGA has been the government's exclusive manufacturer since September, 1992. Grid North are the north-south grid lines on the map. compass.The Army uses two types of compasses: the M2 compass and the lensatic compass. Using the Key we will adjust the declination to 12 degrees east as shown below. The lid also makes a long edge that's great for map work. There are 6,400 mils in a circle versus 360 degrees in a circle. Found inside – Page 2(7) Given the requirement, a military topographic map, lensatic compass, protractor, map pen, and paper, determine straight-line distance between two points in accordance with FM 21-26. (8) Given the requirement, a military topographic ... That said, I always bring a map and a compass just in case the GPS craps out on me. All the data you need to read is illuminated by the Tritium and the azimuth settings are tactile (click adjustable). I cover that in Part 2. Posted: 1/16/2012 4:55:54 PM EST. Cammenga Tritium Compass 3H. First . Equipped with 7 Tritium micro-lights, providing continuous illumination for over 12 years. When you hold a map, north is at the top, west is left, and east right. Often Grid North and True North are exactly the same. Step One: Take a Compass Bearing on the Ground. free brochure. When you take a reading with your compass using north, you must take into account declination and re-orient north by adding N declination degrees east or west. Years ago, before the Internet, many people would discard old maps and purchase new ones with current and more accurate declination information. This plotter is the size of a credit card and convenient to carry. If we walk east of North with a bearing of 15 degrees if will look like this: The direction we are walking is the blue line and it intersects our circle at the 15˚ East mark. If we remember from the chart example, anything to the left or west of the Y Axis is a negative number. 3. However, used in conjunction with a protractor they are so accurate you could use it to directly artillery fire – one of the reasons it was developed. I feel Brunton now makes a better product than Silva, and Suunto is better than Brunton.

Knowledge and tips to give you the mental edge and prevail in any situation. The lensatic compass is comprised of different parts compared to a baseplate compass. Found inside – Page 2-154TASK NUMBER : 071-329-1011 ORIENT A MAP USING A COMPASS CONDITIONS : Given a standard 1 : 50,000 scale military map and lensatic compass , in a field environment , under daylight conditions . STANDARDS : Within 1 minute , orient the map ... This site was built with recycled electrons to save the environment from global warming. Dial/manual Central Office Repairer - Page 2-118 lensatic compass (NSN 6605-01-196-6971) is to act as a map (grid) azimuth reader if the protractor is lost. The compass needle is mounted on a jeweled bearing allowing it to quickly stabilize the needle compared to baseplate compass needles that are housed in a liquid capsule and subject to air bubbles rendering them inaccurate. Fixed station radio repairer - Page 2-120 Since my blog doesn’t have the ability to post comments and only handful of people have my email address, there won’t be the typical debate on my blog this subject might generate. Learning to use a compass and then letting it collect dust for 5 years does not equate to experienced hands regardless of the compass category. They've been to battlefields all over the world. Cammenga Tritium Lensatic Compass 3H. However there are differences. Lensatic Compass Guide: Lensatic Compass: A Better Protractor Place the protractor on the map and read the bearing, After we get our bearing we do our math (East is Least, West is Best), We set the bearing on our compass from the calculation in step 2, There is a small hole in the center that must be on top of you line of travel, Align the vertical line with a North-South grid line where it crosses the line of travel, If a North-South grid line does not cross your line of travel, you can align the horizontal line with an East-West grid line that crosses your line of travel, Read the bearing at the top of the protractor. Special Forces Soldier's Manual for MOS 12B (SQI S). - Page 2-193 The bottom line: unless you are using this compass to compliment a GPS, taking advantage of GPS features (like the five confidence circles along the edge) this compass is outright hard to use with a map. The map is from an area in the mountains above Palm Springs, and using www.magnetic-declination.com it has changed more than 2 degrees since 1999 and is now 11.63 degrees east versus 13.50 degrees in 1999.   Mapped Bearing – Magnetic Declination = Correct Bearing. The bottom line: unless you are using this compass to compliment a GPS, taking advantage of GPS features (like the five confidence circles along the edge) this compass is outright hard to use with a map. And, secondly, I wanted to confirm that the Lensatic compass could be used effectively with the excellent range of Ordnance Survey Explorer™ 1:25,000 scale (4cm to 1km) maps that most outdoor enthusiasts use in the UK. TBS-PAT-1002k Given a lensatic compass, a surveyed point with a level platform, an azimuth marker, and a surveyed known direction, inspect the lensatic compass, to determine serviceability. To find the bearing using the compass, place the map on a flat surface and look out for the declination line, usually at the map legends. These compasses offer accurate sighting as they are designed to allow you to read the dial while your eye is close to the sight. The advantages of the baseplate/sighting compass like the MC-2 is you can use the compass as a protractor with the map and as a sighting compass using the mirrored cover. A no frills base plate compass, like the Brunton 7DNL ($15.00 list) or the Silva Starter 1-2-3 (list $9.99), are simple compasses that provide the navigator with the basic essentials and no more. The North Pole (true north) is the point where all the lines converge in the upper right of the picture. Today one can get the declination of any location in the US at this website www.magnetic-declination.com. Your map is now oriented to Grid North and is lined up with the terrain around you. With the lid open, the mirror reflects your compass. These balancing zones are important because the vertical intensity and direction of the earth’s magnetic field fluctuates as you move around the globe. Hence, you can use a lensatic compass to find north and the bearings to your destination.

A compass divided into 360 degrees is the most common unit of measurement.

In other words, we would set our compass to a bearing of 5˚ and it will really be pointing to 20˚ because we didn’t orient the map by adjusting the declination. Better yet, fold the mirror back. These maps cover 7.5 minutes of longitude and latitude and vary between 49 and 70 square miles in coverage, dependent on the location. Super easy to get precise readings. Using the SILVA Compass. I will discuss each over the next few paragraphs and describe the pros and cons of each. Some compasses read 360, some zero, and some just have N below the zero/360 tick mark. The Silva brand in Europe is manufactured by a different company. Many manufacturers will often group their compasses into three categories: professional, sports, and recreational. Shooting an azimuth is accomplished by aiming at a visible landmark through the sights of a lensatic compass, much like you would with the iron sights of a gun. Land Nav Task 10 - Orient a Map Using a Lensatic Compass. This is an excellent unit if you know how and why it is used. Further up the price tree are base plate models like the Suunto M-3 Global (retail $42 @ Amazon.com). Apr 24, 2020. Found inside – Page 2-193071-329-1011 ORIENT A MAP USING A COMPASS CONDITIONS : Given standard 1 : 50,000 scale military map and lensatic compass , in a field environment , under daylight conditions . STANDARDS : Within 1 minute , orient the map to the ground ... Most base plate compasses provide 2 ° increments on their dial, while lensatic compasses contain 120 clicks when rotated fully; each click represents a 3 ° shift. Keep this in mind if this compass makes your short list. https://en.m.wikipedia.org/wiki/North_Magnetic_Pole#, How To Become (or not become) A Famous Backpacker. Found inside – Page 2-451ORIENT A MAP USING A COMPASS CONDITIONS Given a standard 1 : 50,000 scale military map and lensatic compass , in a field environment , under daylight conditions . STANDARDS Within 1 minute , orient the map to the ground using a compass ... No one challenged me or questioned the method, which was surprising because if one is expert at map and compass it should have been obvious that the procedure I explained was flawed. The lensatic compass features three main parts. Both styles rose in prominence during World War II, with the lensatic model becoming U.S. Army standard issue during that time and remaining so today. Here’s the definition of the above saying: If something is least, it is less. When you orient a map, North is at the top, South at the bottom, right is East and left is West. 1:50,000-scale military map, a protector, a. pencil, paper, and a compass in daylight. Virtually every book and instructor will go out of its way to point out that in experienced hands, either type of compass can be highly effective–a point worth emphasizing here. First is they are much heavier and secondly they are more difficult to use because they do not have a built-in protractor. At this angle, you can see in the mirror the object aligned with the sighting aids . They are four contiguous maps covering 15 minutes of longitude and latitude. Found inside – Page 15-22Lensatic compass . Figure 15-35.- Plotting an azimuth on a map . LENSATIC COMPASS The lensatic compass is the most commonly used and simplest instrument for measuring directions and angles in the field . Two varieties of magnetic ... That was the point, plus it is better and faster with map than any lensatic. In this post the protractor will be presented as a serious tool that backpackers may want to consider, and for those who have used and then abandoned a map protractor, perhaps a re-visit might be worthwhile. This is NOT a used compass. Both are baseplate orienting compasses. Those would be my choices if I was in the market for a baseplate orienting compass. Each of the articles in the LandNav101 series are building blocks and are to remind each of us that land navigation is a perishable skill. Some people think of hiking or camping weekends as a single person's thing.

PDF ADOBE FORMAT: HOW TO TEST the lensatic compass to see if it meets Military Specifications. This is the civilian-issued version of the US military M-1950 3H field compass (MIL-PRF-10436N). However, it is a great family activity for many reasons. Found inside – Page 2-324ORIENT A MAP USING A COMPASS CONDITIONS Given a standard 1 : 50,000 scale military map and lensatic compass , a field environment , under daylight conditions . STANDARDS Within 1 minute , orient the map to the ground using a compass so ... AOFAR AF-4580 Military Compass Lensatic Sighting Navigation, Waterproof and Shakeproof with Map Measurer Distance Calculator, Pouch for Camping, Hiking, Hunting, Backpacking. As you move to the right of the X axis, the values increase. The lack of technology compels the family to actually communicate with each other while focusing on a common goal such as finishing the mapped . Best practices involving up to date medical information and life saving equipment.

The rear lens flips out when the compass is open, and is used to read the dial. A typical lensatic compass is shown at the right (from FM 21-25). VIDEO - Wilderness Navigation. But, we can make this really, really simple. FAQs - Cammenga Lensatic Compass - The lensatic compass is often referred to as the military compass. The key to this sentence is experienced hands. USGS topo maps have the declination printed at the bottom of the map as in the example below: When you look at a typical compass used for backpacking it is divided into 360 degrees and usually in 2 degree increments, as in the picture below. According to the Navis website, a gyrocompass harnesses the force of gravity to a gyrowheel so that the axis of the wheel will always seek the north-to-south line. If, for any reason, the lensatic compass were to malfunction, the base would be the piece that you would want to still work. Doing that with a lensatic compass is much like doing that with any other compass. Get a book, my recommendation is, Be Expert With Map and Compass, Bjorn Kjelstrom, excellent book, and if you have a compass when you read it you will have a greater understanding when done. As this series is about getting back to basics, we aren’t going to cover the plethora of digital compass solutions that have shown up in the market over the last half-dozen years. The compass has a folding sight for precise orienteering of direction. Found inside – Page 276229 North by means of sun and plumb bob 229 North by means of vegetation 231 North without use of compass 229 ... R. F. 17 Slope 57 Difference between map and sketch 135 Direction , Outline of course in 242 Direction , Problems in 37 ... Baseplate: the compass is encased in a baseplate. Place compass on map with the straight edge along your desired direction of travel. Not being a map compass but a lensatic compass makes it easier to navigate. It's common to refer to an azimuth as "measured" when it was determined a map, and "shot" when it was determined from using a lensatic compass.

For decades the “gold standard” for backpacking maps has been the 7.5 minute US Geological Survey (USGS) Topographical Maps. Because we are not laying a compass on the map, moving it around, and adjusting the compass, it is more likely your measurement will be more accurate with a map protractor. Given a compass and a designated point on the ground. This good quality compass has an adjustable diopter lens that will show you the way forward once you've determined your path, a rotating bezel ring that makes it easy to stay your course and a built in level.

Apr. This is NOT a replica. We’ll be using our topo map for Sam Houston National Forest, a base plate compass with orienting lines, and the handy UTM plotter. LENSATIC COMPASS Base-The main body of the compass. How to Use a Lensatic Compass - Brunton However in our chart (above) we crossed the circle at 345˚. He began writing professionally online in 2008. 6104 W Pioneer Pkwy Ste 212Arlington, TX 76013, Proudly managed inthe great state of Texas. Best Compasses For Outdoor in 2021 [Buying Guide] - Gear ... The Explorer Pro is a compass that provides a gear driven adjustment mechanism. FA target acquisition specialist - Page 2-388 I speak from first-hand experience. You could do it with a good lensatic compass like an old GI surplus one with the sighting arrangement and a map protractor. How to Use a Compass and Map for Navigation You can open the mirror and use the mirror’s index line to sight and follow your bearing. 2. These are used for lining up with an object whose bearing is sought.

Pick out a landmark along your direction of travel and move towards it, checking periodically that your needle and red needle outline are aligned. technical performance of the Lensatic compass against various protractor base-plate compasses. It is a more precise instrument because of this sighting arrangement, but the lens does does not make it more accurate than a base plate compass. Found inside – Page 2-283TASK NUMBER : 071-329-1011 ORIENT A MAP USING A COMPASS CONDITIONS : Given a standard 1 : 50,000 scale military map and lensatic compass , in a field environment , under daylight conditions . STANDARDS : Within 1 minute , orient the map ... Three of the dominant compass manufacturers include Suunto, Brunton and Silva. VIDEO - GPS vs COMPASS. The case cover should be pointing toward the top of the map. I use Caltopo a lot on my computer, not sure if they have an app or not, but they're free. 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. If, for any reason, the lensatic compass were to malfunction, the base would be the piece that you would want to still work. If you’re going to purchase a new compass, this is a highly recommended feature. An azimuth (arrow needle) stays . Accuracy +/- 40 mils. This exact compass is what I'm used to so it's what I bought to get back into backpacking. The picture below shows how the magnetic north (blue line) has moved since the 1590, and since 1904 it has been steadily moving in a northwesterly direction. That tool is the map protractor.

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