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Report Date: 19 Aug 2021 071-COM-1014 Locate an Unknown Point on a Map and on the Ground by Intersection Status: Approved ____________________________ Security Classification: U - Unclassified Distribution Restriction: Approved for public release; distribution is unlimited. Destruction Notice: None Foreign Disclosure: FD1 - This training product has been reviewed by the training developers in coordination with the G2, Ft Benning, GA 31905 foreign disclosure officer. This training product can be used to instruct international military students from all approved countries without restrictions. Page 1

Conditions: You are a member of a squad or section and have a requirement to determine the location of the unknown point on the map. You have a 1:50,000-scale military map, a magnetic compass, a military protractor, pencil, paper, and an item that can be used as a straight edge. There are at least two well-defined points on the ground that you can locate on the map. Some iterations of this task should be performed in MOPP 4. Standards: Determine the grid coordinates of the unknown point to within 100 meters; include the two-letter 100,000 meter square identifier, using either the map-and-compass method or the straight edge method. Special Conditions: None Safety Risk: Low MOPP 4: Sometimes Cue: None Remarks: None Notes: Intersection is the location of an unknown point by occupying at least two (preferably three) known positions on the ground (either successively by one Soldier or simultaneously by two or more Soldiers), then plotting on the map the grid azimuth of each of these known points to the unknown point, and identifying the point on the map where the lines intersect. It is used to locate distant or inaccessible points or objects such as enemy targets and danger areas. There are two methods of intersection: the map-and-compass method and the straight edge method. Task Statements DANGER None WARNING None CAUTION None Page 2

(Asterisks indicates a leader performance step.) Evaluation Guidance: Score the Soldier GO if all performance measures are passed. Score the Soldier NO-GO if any performance measure is failed. If the Soldier scores a NO-GO, show the Soldier what was done wrong and how to do it correctly. Evaluation Preparation: Setup: Provide the Soldier with the equipment and materials described in the conditions statement. Brief the Soldier: Tell the Soldier what is required to successfully complete the task by reviewing the conditions and standards. Stress the importance of observing cautions, warnings, and dangers, as applicable. c. Identify the point where the lines intersect as the location of the unknown point. d. Determine the grid coordinates to this location to the desired accuracy. 2. Identify an unknown point on a map by intersection using the straight edge method (Figure 2). Figure 2. Intersection using the straight edge method. a. Orient your map on a flat surface using terrain association. b. Mark your position (the observers) on the map. c. Draw an intersection line for each of these plotted points. (1) Lay a straight edge on one of the two known observer points on the map. (2) Rotate the straightedge on the map until the straightedge lines up with both the known observer position on the map (Point A and Point B in Figure 2) and the unknown position in the distance (Point C in Figure 2). (3) Draw a line along the straight edge from the known observer position toward the unknown position on the ground. (4) Repeat steps 2c(1) through 2c(3) for each plotted point. d. Identify the point where the lines intersect as the unknown location. e. Determine the grid coordinates to this location to the desired accuracy. Page 4

Supporting Reference(s): Materiel Items (NSN) : Environment: Environmental protection is not just the law but the right thing to do. It is a continual process and starts with deliberate planning. Always be alert to ways to protect our environment during training and missions. In doing so, you will contribute to the sustainment of our training resources while protecting people and the environment from harmful effects. Refer to the current Environmental Considerations manual and the current GTA Environmental-related Risk Assessment card. Safety: In a training environment, leaders must perform a risk assessment in accordance with current Risk Management Doctrine. Leaders will complete the current Deliberate Risk Assessment Worksheet in accordance with the TRADOC Safety Officer during the planning and completion of each task and sub-task by assessing mission, enemy, terrain and weather, troops and support available-time available and civil considerations, (METT-TC). Note: During MOPP training, leaders must ensure personnel are monitored for potential heat injury. Local policies and procedures must be followed during times of increased heat category in order to avoid heat related injury. Consider the MOPP work/rest cycles and water replacement guidelines IAW current CBRN doctrine. PERFORMANCE MEASURES GO NO-GO N/A 1. Identified an unknown point on a map by intersection using the map-and-compass method. 2. Identified an unknown point on a map by intersection using the straight edge method. Step Number Reference ID Reference Name Required Primary Source Information TC 3-25.26 MAP READING AND LAND NAVIGATION (https://armypubs.us.army.mil/doctrine/DR_ pubs/dr_c/pdf/tc3_25x26.pdf) Yes No TADSS : None Equipment Items (LIN): None Step ID NSN LIN Title Qty 0000-00-0.C63317 COMPASS LENSATIC 1 7510-00-164-8864 Lead Pencil Graphite 2 (DISCONTINUED WITHOUT REPLACEMENT) (DISCONTINUED WITHOUT REPLACEMENT) 1 6675-01-431-5541 Scale, Drafting 1 7643-01-404-4393 Topo, MC&G Products 1 Prerequisite Individual Tasks : None Supporting Individual Tasks : Task Number Title Proponent Status 071-COM-1001 Identify Terrain Features on a Map 071 - Infantry (Individual) Approved 071-COM-1002 Determine the Grid Coordinates of a Point on a Military Map 071 - Infantry (Individual) Approved Supported Individual Tasks : None Supported Collective Tasks : None Knowledges : Knowledge ID Knowledge Name 071-NAV-0027 Military Grid Reference System 071-NAV-0026 Terrain Features 071-NAV-0033 Distance Measuring Techniques 071-NAV-0032 Azimuths 071-NAV-0030 Grid Magnetic Angle 071-NAV-0021 Compass Operations 071-NAV-0023 Cardinal Directions Page 5