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Contents

1. Training strategy
2. Maps
3. Marginal information and symbols
4. Grids
  - Reference system
  - Geographic coordinates
  - Military grids
  - United states army military grid reference system
  - Locate a point using grid coordinates
  - Locate a point using the us army military grid reference system
  - Grid reference box
  - Other grid systems
  - Protection of map coordinates and locations
5. Scale and distance
6. Direction
7. Overlays
8. Aerial photographs
9. Navigation equipment and methods
10. Elevation and relief
11. Terrain association
12. Mounted land navigation
13. Navigation in different types of terrain
14. Unit sustainment

A. Field sketching
B. Map folding techniques
C. Units of measure and conversion factors
D. Joint operations graphics
E. Exportable training material
F. Orienteering
G. M2 compass
H. Additional aids
I. Foreign maps
J. Global positioning system
K. Precision lightweight global positioning system receiver

4-9. PROTECTION OF MAP COORDINATES AND LOCATIONS

A disadvantage of any standard system of location is that the enemy, if he intercepts one of our messages using the system, can interpret the message and find our location. It is possible and can be eliminated by using an authorized low-level numerical code to express locations. Army Regulation 380-40 outlines the procedures for obtaining authorized codes.

a.   The authorized numerical code provides a capability for encrypting map references and other numerical information that requires short-term security protection when, for operational reasons, the remainder of the message is transmitted in plain language. The system is published in easy-to-use booklets with sufficient material in each for one month's operation. Sample training editions of this type of system are available through the unit's communications and electronics officer.

b.   The use of any encryption methods other than authorized codes is, by regulation, unauthorized and shall not be used.



Grids
Reference system | Geographic coordinates | Military grids | United states army military grid reference system | Locate a point using grid coordinates | Locate a point using the us army military grid reference system | Grid reference box | Other grid systems | Protection of map coordinates and locations |





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