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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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. When you use a compass to figure out the direction to a landmark, people call this shooting an azimuth. Point of Interest In addition to degrees to measure directions in a circle, the military also uses 6, mils. In your case, however, your declination is degrees West, meaning you’ll have to add degrees before you set your compass.
It may take a while to get it, and you should practice in a safe location before relying on one, but few devices are more able to help you ti your way to safety. In the last article we talked about declination, and how magnetic north and true north will vary depending on location and surrounding features.
The bezel clicks as it moves–three degrees for every click. The cover protects the compass from damage and also contains a wire stretched from top to bottom. A compass is a floating magnetic needle that always points toward cokpass magnetic north pole. Proceed to that target. 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.
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Using a Lensatic Compass
Nowusing a straight edge, draw the bearing line and extend it in the desired direction. Using a compass we compss sight a bearing to our cabin across the lake. The need to carefully orient the map, and the precautions about metal in the vicinity of the compass makes this type of plotting more difficult than most other methods.
Like any skillit is good to practice navigating with a lensatic compass before your life depends on it.
Lensatic Compass Guide
Holding the compass compaass to your face, angle the rear sight so that you can read the compass dial clearly through the lens while peering through the sighting slot and lining your distant target the water tower, in this case up with the sighting wire.
Sometimes even a metal belt buckle can interfere with a copmass, which can result in an incorrect reading. Resection with a lensatic compass is a process whereby you can determine your own location from that of two known points in the distance.
For this task, the lensatic compass really shines. Pay particular attention to the surface your are working on. 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.
We can abbreviate to either mils Mag. It has a half life of about 12 years. Next Best Ways to Build a Campfire: Putting the two in a opaque bag or enclosure is effective as well.
Plotting a bearing on a map using a round lensatic compass
Mark the position of the notches to be with usee pencil. This is a low level radioactive isotope that is used in a multitude of applications where self-powered illumination is necessary.
Make sure you include it when you say or write a bearing. So, take your map and lsnsatic it down on a flat surface i. 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.
Note that we are using the magnetic dial in the compass. Well, that is, unless you’re doing something silly like lensatc the compass backwards.
Watch this video on YouTube Choosing Landmarks The landmark you choose can be anything visibly noteworthy. Just use the tape to mark the angle you need to point the needle in order to be pointing at true north.
The normal method to transfer angles from your lensatic compass to your map and back is with a protractor and a pencil. Be sure you understand magnetic declination. When we plot it on the map, we will start plotting at the known location, and extend the bearing line back towards the unknown location.
Warning Always double check your compass hhow. How to Find a Map Direction. Some of the components’ terms are used in the explanations below.