Page 3: Introduction A. Army and Troop Command. This compass is known throughout the world for its precision, reliability, versatility, ruggedness and much more. It has helped to save lives in times of war and provided many with recreational and commercial usefulness in times of peace. Page 4 Luminous Bezel Indicator: Used to mark an azimuth during day or night.
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When hiking, use a map to help you navigate unfamiliar terrain. Tritium is considered safe for external use because it is a weak beta particle emitter — so weak in fact that the radiation it emits cannot penetrate human skin. Then, from where you are, shoot an azimuth to the feature as accurately as possible, and calculate the back azimuth from that reading. A typical lensatic compass is shown at the right from FM Here, they agree, so there is no deviation and the measurements have been accurately taken.
According to United States Army Corps of Engineers, the engineer compass is also called a lensatic compass. A plumb bob can lesatic suspended so that it cuts Polaris, and the bearing to the plumb bob cord then measured. To the north of State Route about 2 miles east of Windsor, Colorado there is Antelope Hill, a two-peaked hill about 50 ft. It is magnetictrue or grid when referred to magnetic north, geographical north or grid north, respectively. Lensatic Compass Declination is extreme and rapidly changing with position in polar areas, making the compass worthless as a navigation aid there.
Use the illustration above to familiarize yourself with the components of a lensatic compass. A plot of the traverse can then be made, and the enclosed area calculated. Irregular magnetic storms are periods of greatly increased ionization. From these bearings, the angles A and B can be determined. Line up the sighting groove in the bracket with the wire and an object in the enginwer. Using a Lensatic Compass Distances like this can be determined from the map, or from a vehicle odometer, if great precision is not required.
The compass card may have a sapphire cap and an agate point for its pivot. Locate yourself and a prominent distant object on the map, and measure its magnetic bearing with the compass. To use your lensatic compass to find the direction of your intended azimuth which you probably got from your map, using your protractor:.
Putting the two in a opaque bag or enclosure is effective as well. In the southern temperate zone, point the 12 in the direction of the sun, and then north is halfway between the 12 and the hour enyineer.
How to Use the Engineer Compass. Turn your entire body as a unit until your predetermined azimuth falls under the fixed black index line. A diagram always helps to keep the direction of the declination straight.
Take your lensatic compass and open it up all the way so it is one flat line. The sun sends ionizing ultraviolet radiation reaching the earth in about 8 minutes after it is emitted, and streams of particles, mainly protons, that take longer to reach the earth. This is a low level radioactive isotope that is used in a multitude of applications where self-powered illumination is necessary.
In the northern hemisphere, the field points downward to the north, so the south end of the ,ensatic must be weighted. Things Needed Engineer lensatic compass. Lensatic Compass gives an introduction to the use of the compass.
Cammenga PRECISION LENSATIC Instructional Booklet
How to Calibrate a Magnetic Compass By Anthony Thompson An engineer lensatic compass, also known as a hand compass or sighting compass, allows you to take bearings on physical landmarks which can then be used to determine your exact position on a map or navigate toward the landmark even when it can no longer be seen. This type of compass is also commonly used in the military and for orienteering. Step 1 Lift the front sight of the compass, which also acts as a protective cover, so it is at a degree angle to the base. Position the rear sight so it leans forward over the compass wheel at an angle of around 45 degrees. Step 2 Raise the compass up to your cheek and look at your chosen landmark through the sights. To improve accuracy, ensure the landmark is in the center of the front sight and fully aligned with the sighting slot above the rear lens. Step 3 Adjust the position of the rear lens so you can read the bearing on the compass wheel while still maintaining an accurate fix on the landmark.
Directions for Using an Engineer Lensatic Compass
How to Use an Engineer Lensatic Compass By David Chandler The engineer lensatic compass is a precision instrument useful in measuring directions to objects and for land navigation. These compasses are not artillery compasses but are used in a very similar fashion. As the name implies, the lensatic compass employs a lens in the rear sight that allows precise readings of the dial. This precision is ineffective if the compass is improperly held or misused when taking an azimuth. Centerhold Technique Open the compass by folding down the thumb loop and opening the front cover until it is flat with the base of the compass. Raise the rear sight until it is perpendicular to the base. Hold the compass by placing your thumb through the thumb loop and extending the index finger along the side of the base.
How to Use an Engineer Lensatic Compass
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