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Learn how to use the lensatic compass used by the US Military. Plotting a bearing on a map using a round lensatic compass. Sighting the bearing. To determine our location we are going to combine two pieces of information. Use a compass to explore, navigate, map terrain and travel around the Engineers, the engineer compass is also called a lensatic compass.

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Face the object that you want to measure using the engineer compass. You will use these notches to align your compass with a line on the map or to mark the location of a bearing line your are about to draw. Some of the components’ terms are used in the explanations below.

Point of Interest In addition to lemsatic to measure directions in a circle, the military also uses 6, mils. Use a compass to explore, navigate, map terrain and travel around the world. You then see where the comoass you drew intersects with the protractor’s numbers, in this case degrees.

The degrees are in red, and are the ring’s inner measurements. This means that at around the 12 year mark, the tritium in your lensatic compass will have radiated about half usw energy that it has to offer.

Plotting a bearing on a map using a round lensatic compass

For this task, the lensatic compass really shines. How to Calculate Azimuth. She has been studying health and fitness issues for more than 10 years. Watch this elnsatic on YouTube Choosing Landmarks The landmark you choose can be anything visibly noteworthy.

Point of Interest An “azimuth” is pretty much the same as a “bearing. Rough direction to the cabin. What Are the Parts of a Sextant? According to United States Army Corps of Engineers, the engineer compass is also called a lensatic compass.

That is, take the azimuth you recorded and subtract degrees from it, or mills if using a military lensatic compass. 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. Making sure you don’t move to change directions, turn the glass compass housing lrnsatic the short luminous line is directly lined up with the luminous magnetic arrow.


So the tritium will continue emitting “light” for quite a long time before it goes ohw dark. What I haven’t covered in much detail is some of the nuances of lensatic compasses, such as the tips and tricks to getting the most out of them in the field.

To compss our location we are going to combine two pieces of information on our map. Place your thumb through the thumb loop, hold your lensqtic finger alongside the body of the compass, and support it with the rest of your fingers.

Watch this video on YouTube Another useful method is to orient your map to north by using your compass. Close is good enough in horsehoes, but I’m hoping exact is the standard for artillery fire. The lensatic compass is used by the U. 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. Or make a permanent scratch mark, paint line, or permanent marker line on each end.

Using your protractor or other straight edge, you draw a line from your current position in the direction of where you want to go. Some compasses can be adjusted to include declination, so after adjustment, a reading of 0 degrees would point at true ho.

To find directions from your map, you’re going to need a protractor, a special instrument used for measuring angles. Most lensatkc are aware that lensatic compasses are fitted with small amounts of tritium around the dial.

Robin Reichert is a certified nutrition consultant, certified personal trainer and hkw writer. Use a file to make a permanent notch at each end.

Since the ultimate goal is to transfer the angle between the map and compass, why not do it directly? You want to find your position using the technique of partial resection, so you need to know that tower’s bearing with a high degree of accuracy.


After reading those two articles anyone should be able to go out and perform basic land navigation with a map and lensatic compass. Next, rotate the entire thing map and compass until your compass is telling you that it’s pointing north.

How to Read an Engineer Compass | Sciencing

When hiking, use a map to help you navigate unfamiliar terrain. In the last article we talked about declination, and how magnetic north and true north will vary depending on location and surrounding features.

How to Hold a Lensatic Compass. Note that we are using the magnetic dial in the compass. Hold it square and straight in front of you like you mean business.

All you do is take you compass and line it up from your current point to your desired destination and look at the compass reading. You may be tempted to use the MN line on the declination diagram, but be careful. Open the cover completely and lensativ back the rear sight. Some of these compasses have a notch at each end of the housing along this line. How to Read an Engineer Compass.

This is a low level radioactive isotope that is used in a multitude of applications where self-powered illumination is necessary. Jow a lot of room for error and mistakes, and it takes time, which is sometimes a very precious commodity. 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.

How to Use a Bushnell Voyager Telescope. The older the map, the more likely the declination shown in the diagram is no longer correct.