US ARMY - Map Reading And Land Navigation.pdf

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HEADQUARTERS
DEPARTMENT OF THE ARMY
FM 3-25.26 (FM 21-26)
MAP READING
AND
LAND NAVIGATION
DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited.
FM 3-25.26
(FM 21-26)
FIELD MANUAL
No. 3-25.26
HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC , 20 July 2001
MAP READING AND LAND NAVIGATION
CONTENTS
Page
PREFACE
.......................................................................................................................... v
Part One
MAP READING
CHAPTER 1. TRAINING STRATEGY
1-1. Building-Block Approach .........................................................1-1
1-2. Armywide Implementation .......................................................1-2
1-3. Safety.........................................................................................1-2
CHAPTER 2. MAPS
2-1. Definition ..................................................................................2-1
2-2. Purpose......................................................................................2-1
2-3. Procurement ..............................................................................2-2
2-4. Security .....................................................................................2-3
2-5. Care ...........................................................................................2-3
2-6. Categories..................................................................................2-3
2-7. Military Map Substitutes...........................................................2-7
2-8. Standards of Accuracy ..............................................................2-8
CHAPTER 3. MARGINAL INFORMATION AND SYMBOLS
3-1. Marginal Information on a Military Map..................................3-1
3-2. Additional Notes .......................................................................3-5
3-3. Topographic Map Symbols .......................................................3-5
3-4. Military Symbols.......................................................................3-6
3-5. Colors Used on a Military Map.................................................3-6
CHAPTER 4. GRIDS
4-1. Reference System......................................................................4-1
4-2. Geographic Coordinates............................................................4-1
4-3. Military Grids..........................................................................4-10
DISTRIBUTION RESTRICTION:
Approved for public release; distribution is unlimited.
_________________
*This publication FM 3-25.26 supersedes FM 21-26,
7 May 1993.
i
FM 3-25.26
Page
4-4.
4-5.
4-6.
4-7.
4-8.
4-9.
United States Army Military Grid Reference System ............4-12
Locate a Point Using Grid Coordinates ..................................4-17
Locate a Point Using the US Army Military Grid
Reference System....................................................................4-21
Grid Reference Box.................................................................4-24
Other Grid Systems .................................................................4-25
Protection of Map Coordinates and Locations........................4-27
CHAPTER 5. SCALE AND DISTANCE
5-1. Representative Fraction.............................................................5-1
5-2. Graphic (Bar) Scales .................................................................5-3
5-3. Other Methods.........................................................................5-11
CHAPTER 6. DIRECTION
6-1. Methods of Expressing Direction .............................................6-1
6-2. Base Lines .................................................................................6-1
6-3. Azimuths ...................................................................................6-2
6-4. Grid Azimuths...........................................................................6-4
6-5. Protractor...................................................................................6-5
6-6. Declination Diagram .................................................................6-8
6-7. Intersection..............................................................................6-14
6-8. Resection .................................................................................6-16
6-9. Modified Resection .................................................................6-19
6-10. Polar Coordinates ....................................................................6-20
CHAPTER 7. OVERLAYS
7-1. Purpose......................................................................................7-1
7-2. Map Overlay .............................................................................7-1
7-3. Aerial Photograph Overlay .......................................................7-3
CHAPTER 8. AERIAL PHOTOGRAPHS
8-1. Comparison With Maps ............................................................8-1
8-2. Types .........................................................................................8-1
8-3. Types of Film ............................................................................8-7
8-4. Numbering and Titling Information..........................................8-7
8-5. Scale Determination ..................................................................8-8
8-6. Indexing ..................................................................................8-10
8-7. Orienting of Photograph..........................................................8-13
8-8. Point Designation Grid............................................................8-14
8-9. Identification of Photograph Features.....................................8-17
8-10. Stereovision.............................................................................8-18
ii
FM 3-25.26
(FM 21-26)
Page
Part Two
LAND NAVIGATION
CHAPTER 9. NAVIGATION EQUIPMENT AND METHODS
9-1. Types of Compasses..................................................................9-1
9-2. Lensatic Compass......................................................................9-1
9-3. Compass Handling ....................................................................9-2
9-4. Using a Compass.......................................................................9-3
9-5. Field-Expedient Methods..........................................................9-7
9-6. Global Positioning System......................................................9-12
CHAPTER 10. ELEVATION AND RELIEF
10-1. Definitions...............................................................................10-1
10-2. Methods of Depicting Relief...................................................10-1
10-3. Contour Intervals.....................................................................10-2
10-4. Types of Slopes .......................................................................10-5
10-5. Percentage of Slope.................................................................10-8
10-6. Terrain Features ....................................................................10-11
10-7. Interpretation of Terrain Features .........................................10-17
10-8. Profiles ..................................................................................10-20
CHAPTER 11. TERRAIN ASSOCIATION
11-1. Orienting the Map ...................................................................11-1
11-2. Locations .................................................................................11-6
11-3. Terrain Association Usage ......................................................11-7
11-4. Tactical Considerations...........................................................11-9
11-5. Movement and Route Selection ............................................11-12
11-6. Navigation Methods ..............................................................11-14
11-7. Night Navigation...................................................................11-18
CHAPTER 12. MOUNTED LAND NAVIGATION
12-1. Principles.................................................................................12-1
12-2. Navigator's Duties ...................................................................12-1
12-3. Movement ...............................................................................12-1
12-4. Terrain Association Navigation ..............................................12-3
12-5. Dead Reckoning Navigation ...................................................12-6
12-6. Stabilized Turret Alignment Navigation.................................12-7
12-7. Combination Navigation .........................................................12-8
CHAPTER 13. NAVIGATION IN DIFFERENT TYPES OF TERRAIN
13-1. Desert Terrain .........................................................................13-1
13-2. Mountain Terrain ....................................................................13-4
13-3. Jungle Terrain .........................................................................13-6
13-4. Arctic Terrain ..........................................................................13-9
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FM 3-25.26
Page
13-5. Urban Areas ..........................................................................13-10
CHAPTER 14. UNIT SUSTAINMENT
14-1. Set Up a Sustainment Program ...............................................14-1
14-2. Set Up a Train-the-Trainer Program .......................................14-2
14-3. Set Up a Land Navigation Course...........................................14-2
APPENDIX A. FIELD SKETCHING........................................................................... A-1
APPENDIX B. MAP FOLDING TECHNIQUES ........................................................ B-1
APPENDIX C. UNITS OF MEASURE AND CONVERSION FACTORS ................ C-1
APPENDIX D. JOINT OPERATIONS GRAPHICS .................................................... D-1
APPENDIX E. EXPORTABLE TRAINING MATERIAL.......................................... E-1
APPENDIX F.ORIENTEERING.....................................................................................F-1
APPENDIX G. M2 COMPASS..................................................................................... G-1
APPENDIX H. ADDITIONAL AIDS........................................................................... H-1
APPENDIX I. FOREIGN MAPS.................................................................................. I-1
APPENDIX J. GLOBAL POSITIONING SYSTEM ................................................... J-1
APPENDIX K. PRECISION LIGHTWEIGHT GLOBAL POSITIONING
SYSTEM RECEIVER ......................................................................... K-1
GLOSSARY.........................................................................................................Glossary-1
REFERENCES................................................................................................. References-1
INDEX ......................................................................................................................Index-1
iv

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