![]() ![]() Sewing kit, a thread from the core of a piece of para-cord, dental floss. Some field expedient string sources include, thread from a Line it up with the bearing on the edge of the protractor, and use the straight lineĬreated by the thread to follow the bearing away from the edge of the protractor. Longer that twice the distance you might want to extend a bearing.) Pull the string tight, String through the center hole and tie the ends together. Tools with protractors have a hole in the center. This is what we demonstrated in the above example.Īnother technique is to use a piece of thread to show your bearing line. Draw a line between these two points, and extend it asįar as you need to. Now place a straight edge between the known point and the mark you One of simplest techniques is to place a small pencil mark on the correct bearing at theĮdge of the protractor. Techniques for extending the bearing line The center of your protractor will be at the intersection of a line drawn between 0° and 180° and a line between 90° and 270°ĭetermine what lines to use to align your protractor with your north reference lines on your map.Ī protractor that is well suited for navigation will have numerous parallel lines aligned with 0° to 180° on the protractor. You will place the center of the protractor on the known point where you are plotting your bearing. ![]() Some protractors are numbered in four 90° quadrants,Īnd are a probably not a good choice for navigation use.įind the center point for your protractor. Make sure you use the correct set of numbers. You proceed in a clockwise direction? Many protractors used for drafting are numbered in both clockwise and counterclockwise directions. Is you protractor marked in degrees? Are the marks spaced at one, two, or five degrees? Is it a full or half circle protractor. 0° (and 360°)Īre aligned with our north reference, 90° is to the East, 180° to the South, and 270° to the West. String shown is “guts” from 550 cord.Familiarize yourself with your protractorīefore you set you protractor down onto the map, take a good look at it and make sure you understand the markings.įor navigation purposes, we use an angular measurement system where a circle is divided into 360 degrees. String not included, shown just for illustrative purposes. This is why the design of the UTM Grid Reader is a circle instead of a square.Ĭircular compass rose around the exterior 360 degrees.ĭurable and commercially produced for us by one of the leading protractor makers in the USA. My teammate from Max Ordinate Academy (Marine Scout Sniper) runs a string in a loop tied around the UTM Grid Reader which makes it much more effective. When the Military Map protractor is rectangular, it is less consistent to run the string. To do this, we run a string from the center of the UTM Grid Reader to the point on the map, and then check the edge of the tool for the direction we can use on the compass. We will often run 2 maps, a small 1:24000 map for more of an overview, and a 1:12000 map for double the detail, and so having both slot tools on a single UTM Grid Reader or Military Map protractor is a huge benefit.įinally we often use the tool to check or get an azimuth or direction reading. We wanted a 1:12000 grid slot tool, but they are extremely rare to find, and we tried using a corner marking tool, but they are not nearly as easy to use as the slot tools. The slot tools feature a slot along the vertical axis which make marking a point super quick and they are easy to read. We struggled to find the best tool since most UTM Grid Readers we prefer (also called slot tools) use a 1:24000 grid. See the other pictures for more information. In the main picture (a digital prototype), the pink/red is actually white around the outside edge (in the real life tool), and the slot cut lines are displayed as red lines. However we have been running a larger set of maps using a 1:12,000 scale so we can see more detail. ![]() The provided maps are 1:24,000 scale on a UTM grid. The main focus of this event is land navigation. Since 2016 Bison Tactical has participated in a 24-48 hour land navigation race called the Sniper Adventure Challenge. This is the Bison Tactical custom UTM Grid Reader. UTM Grid Reader | Military Map Protractor ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |