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Contents

1. Training strategy
2. Maps
3. Marginal information and symbols
4. Grids
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

Survival Gear

Handheld GPS
Specialty Outdoor Gear
Digital Compasses
Survival Books
Hunting and Fishing Magazines

UNITS OF MEASURE AND CONVERSION FACTORS

This appendix provides conversion tables for units of measure and conversion factors that are used in military operations.

12 inches

36 inches

3 feet

1,760 yards

2,026.8 yards

5,280 feet

6,080.4 feet

63,360 inches

72,963 inches

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=

=

=

=

=

=

=

=

1 foot

1 yard

1 yard

1 mile statute

1 mile nautical

1 mile statute

1 mile nautical

1 mile statute

1 mile nautical

Table C-1. English system of linear measure.

 

1 millimeter

10 millimeters

10 centimeters

10 decimeters

10 meters

10 decameters

10 hectometers

10 kilometers

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=

=

=

=

=

=

=

centimeter

centimeter

decimeter

meter

decameter

hectometer

kilometer

1.0 myriameter

=

=

=

=

=

=

=

=

0.0393 inches

0.3937 inches

3.937 inches

39.37 inches

32.81 feet

328.1 feet

0.62 mile

6.21 miles

Table C-2. Metric system of linear measure.

 

1 mil

1 grad

1 degree

=

=

=

1/6400 circle

1/400 circle

1/360 circle

=

=

=

0.05625°

16.0 mils

about 17.8 mils

=

=

=

0.0625 grad

0°54' = 0.9°

about 1.1 grad

Table C-3. Equivalent units of angular measure.

 

ONE INCHES FEET YARDS STATUTE MILES NAUTICLE MILES mm
Inch 1 0.0833 0.0277 - - 25.40
Foot 12 1 0.333 - - 304.8
Yard 36 3 1 0.00056 - 914.4
Statute Mile 63,360 5,280 1,760 1 0.8684 -
Nautical Mile 72,963 6,080 2,026 1.1516 1 -
Millimeter 0.0394 0.0033 0.0011 - - 1
Centimeter 0.3937 0.0328 0.0109 - - 10
Decimeter 3.937

0.328

0.1093

- - 100
Meter 39.37 3.2808 1.0936 0.0006 0.0005 1,000
Decameter 393.7 32.81 10.94 0.0062 0.0054 10,000
Hectometer 3,937 328.1 109.4 0.0621 0.0539 100,000
Kilometer 39,370 3,281 1,094 0.6214 0.5396 1,000,000
Myriameter 393,700 32,808 10,936 6.2137 5.3959 10,000,000

 

ONE cm dm M dkm hm km mym
Inch 2.540 0.2540 0.0254 0.0025 0.0003 - -
Foot 30.48 3.048 0.3048 0.0305 0.0030 0.0003 -
Yard 91.44 9.144 0.9144 0.0914 0.0091 0.0009 -
Statute Mile 160,930 16,093 1,609 160.9 16.09 1.6093 0.1609

Nautical Mile 185,325 18,532 1,853 185.3 18.53 1.8532 0.1853

Millimeter 0.1 0.01 0.001 0.0001 - - -
Centimeter 1 0.1 0.01 0.001 0.0001 - -
Decimeter 10 1 0.1 0.01 0.001 0.0001 -
Meter 100 1 1 0.1 0.01 0.001 0.0001

Decameter 1,000 10 10 1 0.1 0.01 0.001

Hectometer 10,000 100 100 10 1 0.1 0.01

Kilometer 100,000 1,000 1,000 100 10 1 0.1

Myriameter 1,000,000 10,000 10,000 1000 100 10 1

Table C-4. Conversion factors.

Example I

Problem:Reduce 76 centimeters to (?) inches.
76 cm x 0.3937 = 29 inches
Answer:There are 29 inches in 76 centimeters.

Example II

Problem:How many feet are there in 2.74 meters?
2.74 = 9 feet
——
.3048
Answer:There are approximately 9 feet in 2.74 meters.

 

SCALE 1 INCH EQUALS 1 CENTIMETER EQUALS
1:5,000 416.67 feet
127.00 meters
164.00 feet
50.00 meters
1:10,000

833.33 feet
254.00 meters
328.10 feet
100.00 meters
1:12,500 1,041.66 feet
317.00 meters
410.10 feet
125.00 meters
1:20,000 1,666.70 feet
508.00 meters
656.20 feet
200.00 meters
1:25,000 2,083.30 feet
635.00 meters
820.20 feet
250.00 meters
1:50,000 4,166.70 feet
1,270.00 meters
1,640.40 feet
500.00 meters
1:63,360 5,280.00 feet
1,609.30 meters
2,078.70 feet
633.60 meters
1:100,000 8,333.30 feet
2,540.00 meters
3,280.80 feet
1,000.00 meters
1:250,000 20,833.00 feet
6,350.00 meters
8,202.00 feet
2,500.00 meters
1:500,000 41,667.00 feet
12,700.00 meters
16,404.00 feet
5,000.00 meters

Table C-5. Ground distance at map scale.


Units of measure and conversion factors




Buy The Book This Site Is Based On
The 'Land Navigation' section of this site is based on 'Map Reading and Land Navigation', a public domain work published by the U.S. Department of Defense that is available for sale at Amazon.com.




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