Proper use of a compass is a basic but essential skill in backcountry hiking, which often involves getting off marked trails The lensatic Read more. 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.

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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.

Warning Always double check your compass readings. Some compasses can be adjusted to include declination, so lenwatic adjustment, a reading of 0 degrees would point at true north. The usual precautions about magnetic objects in the vicinity of the compass compas be taken. Return from Leneatic Compass to Home.

Turn your entire body as a unit until your predetermined azimuth falls under the fixed black index line. The cover protects the compass from damage and also contains a wire stretched from top to bottom.

Just use the tape to mark the angle you need to point the needle in order to be pointing at true north. 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. Enroll in my personalized step-by-step video-based online course.

Plotting a bearing on a map using a round lensatic compass

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. A truck, your radio, or even the barrel of your hunting air gun can push the needle away from north. Things Needed Engineer lensatic compass. Nowusing a straight edge, draw the bearing line and extend it in the desired direction. Watch this video on YouTube Choosing Landmarks The landmark you choose can be anything visibly noteworthy.


If you don’t, visit the page just hyperlinked. In our example at the lake, our cabin is NE of our current location. 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.

Using your protractor or other straight edge, you draw a line from your current position in the lehsatic of where you want to go. Steady the compass by allowing the hand holding the compass to rest in the cupped palm of your other hand.

Tilt the lens bracket approximately 30 degrees from the perpendicular position of the compass. How to Hold ue Lensatic Compass. The fact that they glow in the dark especially, if lensqtic 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. Now, read the degree marking under the fixed black index line. A round lensatic compass has no straight edge to align. Let’s say you see a water tower off in lensatc distance.

Keep doing this until you get to where you want to go. To use your lensatic compass to find the direction of your intended azimuth which you probably got from your map, using your protractor:. But not to you, I trust. Hold a compass level and steady to prevent the needle from touching the sides of the globe or the dial face. As long as you can hold the compass lensaitc and steady, the exact grip doesn’t matter. You want to go cross country directly to Devil’s Wash Basin, a deep and beautiful lake you’ve heard a lot about.


Point of Interest In addition to degrees to measure directions in a circle, the military also uses 6, mils.

Plotting a bearing on a map using a round lensatic 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. You may be tempted to use the MN line on the declination diagram, but be careful.

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. Instead you will use an imaginary line that runs down the center of the compass.

Refer back to this “reality check” occasionally during plotting to make sure what you are doing makes sense. Declinations to the west are subtracted from the degrees you are reading, and declinations to the east are added. This is known as a back bearing. Two-hand Hold of the Lensatic Compass. Pay particular attention to the surface your are working on. Keep your head still and then read the azimuth through the lens bracket.

According to United States Army Corps of Engineers, the engineer compass is also called a lensatic compass. Looking at the photo below, let’s say you’re at the north end of Sheeler Lake, where the penciled Sue is.

One of the difficulties inherent to using a compass is that magnetic north is not the same as true north.