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 TM 9-258
mils tall at 1,000 meters or 1 mil tall at 2,000 meters.
c. A circle of 1,000 meters radius would have a
circumference of 6,283 meters. A 1-meter portion of the
circumference would be the 1/6283 fractional part of a circle.
NOTE
By choosing the mil as the 1/6400 fractional part of a circle,
'The Navy mil and the French infantry mil are
sufficient accuracy is retained for all practical purposes while
exactly 1 meter at a range of 1,000 meters.
the number can be handled easily by mental arithmetic.
There are 6283.1853 Navy or French
d. The mil provides an extremely small unit of angular
infantry mils in a complete circle.
measurement that is easily adaptable to the small angles
encountered by the artilleryman. For example, if an object has
e. For quick approximate conversion from artillery mils
an angular width or height of 1 mil, it is 1 meter wide or high at
to degrees, or vice versa, refer to figure 10-1. On this chart
1,000 meters; 2 meters wide or high at 2,000 meters; and so
locate the number of degrees or mils to be converted. Directly
on.
In angular height, a man is approximately 2
across the black line of arc is its equivalent.
f. For more exact conversion from artillery mils to
degrees, minutes, and seconds, use the following listing:
Artillery mils
Degrees
Minutes
Seconds
1....................................................................................... 0
3
22.5
2....................................................................................... 0
6
45
3....................................................................................... 0
10
7.5
4....................................................................................... 0
13
30
5....................................................................................... 0
16
52.5
6....................................................................................... 0
20
15
7....................................................................................... 0
23
37.5
8....................................................................................... 0
27
0
9....................................................................................... 0
30
22.5
10....................................................................................... 0
33
45
20....................................................................................... 1
7
30
30....................................................................................... 1
41
15
40....................................................................................... 2
15
0
50....................................................................................... 2
48
45
60....................................................................................... 3
22
30
70....................................................................................... 3
56
15
80....................................................................................... 4
30
0
90....................................................................................... 5
3
45
100 ....................................................................................... 5
37
30
200 ....................................................................................... 11
15
0
300 ....................................................................................... 16
52
30
400 ....................................................................................... 22
30
0
500 ....................................................................................... 28
7
30
600 ....................................................................................... 33
45
0
700 ....................................................................................... 39
22
30
800 ....................................................................................... 45
0
0
900 ....................................................................................... 50
37
30
1,000..................................................................................... 56
15
0
2,000..................................................................................... 112
30
0
3,000..................................................................................... 168
45
0
4,000..................................................................................... 225
0
0
5,000..................................................................................... 281
15
0
6,000..................................................................................... 337
30
0
6,400..................................................................................... 360
0
0
For example, to convert 2,569 mils:
2,000 mils =
1120
30'
0"
500 mils =
280
7'
30"
60 mils =
30
22'
30"
9 mile =
0
30'
22.5"
1430
89'
82.5"
2,569 mile =
1440
30'
22.5"
g. For more exact conversion from degrees and
minutes to artillery mils, use this conversion table:
10-3
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