484 
ARTILLERY IN COAST DEFENCE. 
CORRECTION TABLES REQUIRED IN CASE I. 
(Viz,: when Tangent Elevation is used ) 
NO CORRECTION POR TIDE IS REQUIRED. 
CORRECTION TO RANGE FOR “TIME OF FIRING” (10 SECS.) 
For range of 
900 
1300 
1700 
2100 
2500 
1 
2800 | 
3100 
3400 
3800 
4100 
4400 
4700 
5000 
Correction is 
When number of seconds taken for the range to alter by 50 yards is 
26 
24 
26 
28 
30 
32 
34 
36 
38 
40 
42 
44 
46 
48 
60 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
21 
76 
8 
8* 
9* 
10 
101 
11* 
12 
12* 
13* 
14 
14* 
15* 
16 
100 
6 
6* 
7 
7* 
8 
8a 
9 
9* 
10 
10* 
11 
11* 
12 
125 
6 
5 
5* 
6 
6 * 
7 
7 
7 * 
8 
8* 
9 
9 
9* 
150 
4 
4* 
4k 
6 
5* 
5* 
6 
6* 
7 
Ik 
7* 
8 
175 
— 
— 
4 
4 
4k 
5 
5 
5k 
5k 
6 
6 
5k 
7 
200 
— 
— 
— 
— 
4 
4 
4k 
4\ 
5 
5 
5* 
5k 
6 
225 
— 
— 
— 
— 
— 
— 
4 
4 
4* 
4* 
5 
5 
5k 
250 
4 
4 
4* 
4* 
5 
CORRECTION TO DEFLECTION FOR TIME OF FLIGHT + TIME FOR LAYER TO 
GET CLEAR (4 SECS.) 
For range of 
900 
1300 
1700 
2100 
2500 
2800 
3100 
3400 
3800 
4100 
4400 
47001 
5000 
Correction is 
When number of seconds taken by object to traverse 
one degree of arc 
is— 
Mins. 
15 
24 
28 
32 
36 
40 
44 
48 
52 
56 
60 
64 
68 
72 
30 
12 
14 
16 
18 
20 
22 
24 
26 
28 
30 
32 
34 
36 
45 
8 
9* 
10* 
12 
13* 
14* 
16 
17* 
18* 
20 
21* 
22* 
24 
60 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
75 
6 
5k 
6* 
7 
8 
9 
9* 
10* 
11 
12 
13 
13* 
14* 
90 
4 
4* 
5k 
6 
6* 
7* 
8 
8* 
9* 
10 
10* 
11* 
12 
