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.

Author: Akijar Malagul
Country: Nigeria
Language: English (Spanish)
Genre: Politics
Published (Last): 27 April 2015
Pages: 287
PDF File Size: 1.98 Mb
ePub File Size: 9.80 Mb
ISBN: 578-4-21757-499-7
Downloads: 25432
Price: Free* [*Free Regsitration Required]
Uploader: Gugami

How to Calculate Height With Sextant. Plotting a bearing on a map using a round lensatic compass Sighting the bearing To determine our location we are going to combine lensatix pieces of information on our map. To determine our location we are going to combine two pieces of information on our map.

It has replaced radium in recent decades after it was discovered that radium exposure is linked to an increased occurrence of bone cancer. You can use this feature to set your compass in the dark.

Generally once you have drawn your own Magnetic North line, you will not need to do this again on this map sheet for many years. Turn the compass cover more or less perpendicular to the base.

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. As long as you ot hold the compass level and steady, the exact grip doesn’t matter. But not to you, I trust.


We will be orienting our map with Magnetic North. North is 0 degrees, so a declination of 10 degrees west vompass mean that you would point at degrees to point at true north. Some of these compasses have a notch at each end of the housing along this line. Tritium is considered safe for external use because it ro a weak beta particle emitter – so weak in fact that the radiation it dompass cannot penetrate human skin.

My page, fully illustrated book is yours for the asking. When hiking, use a map to help you navigate unfamiliar terrain. Tilt the lens bracket approximately 30 degrees from the perpendicular position of the 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.

Warning Always double check your compass readings. Use the engineer compass to measure the azimuth to take a bearing or direction.

How to Read an Engineer Compass | Sciencing

We will be plotting our bearing relative to Magnetic North, so there is no need to adjust for a different north reference. Watch this video on YouTube Choosing Landmarks The landmark you choose can be anything visibly noteworthy. You want to go cross country directly to Devil’s Wash Basin, a deep and beautiful lake you’ve heard a lot about.

Whenever the luminous magnetic leensatic lines up with the luminous short line, you’re following your intended azimuth. Using your protractor or other straight edge, you draw a line from your current position in the direction of where you want to go.


L ook through the sighting slot and find some target a tree, boulder, whatever that lines up with your sighting wire.

Plotting a bearing on a map using a round lensatic compass

This is a low level radioactive isotope that is used in a multitude of applications where self-powered illumination is necessary. The reason you want to set up the compass rather than just keep your eyes on the landmark is because your vision may become obscured.

A truck, your radio, or even the barrel of your hunting air gun can push the needle away from north. So with that in mind, I’ll start a series of short articles that each focus on a single tip for getting the most out of your compass.

The declination diagram may not be drawn with an accurate angle, or the angle may not represent the current declination.

It has a half life of about 12 years. You hwo have your target’s bearing. The more back azimuths you can draw, the more accurate your location will be. Make a mark with your pencil at the notch on the end furthest from the sighting wire. Though such a simple device has been around for about a thousand years, compasses have not lost their utility.