ARTILLERY IN COAST DEFENCE, 
485 
CORRECTION TABLES FOR USE IN CASE II. 
I.—COEEECTION TO EANGE FOE STATE OF TIDE. 
At Eange. 
900 
1300 
1700 
2100 
2500 
2800 
3100 
3400 
3800 
4100 
4400 
4700 
5000 
Correction 
When state of tide is— 
is— 
+ 100 
High 
+ 75 
— 
High 
— 
— 
— 
— 
— 
— 
— 
— 
— 
— 
— 
+ 60 
£ 
High 
+ 25 | 
— 
4 
3 
4 
( High 
l to £ 
High 
to f 
High 
to £ 
| High 
High 
High 
High 
— 
— 
— 
( 
( 
( 
High 
High 
High 
0 1 
Mean 
Mean 
Mean 
< Mean 
Mean 
Mean 
1 * 
3 
4 
3 
4 
4 " 
to 
to 
to 
l 
l 
C to £ 
to £ 
to £ 
to £ 
Low 
Low 
Low 
- 25 £ 
- 50 
i 
4 
i 
£ 
Low 
f £ to 
1 Low 
£ to 
Low 
£ to 
Low 
| Low 
Low 
Low 
Low 
— 
— 
- 
- 75 
-100 
Low 
Low 
II.—COEEECTION TO EANGE FOE “ TIME OF FIEING ” (3 SECS.) 
For Eange. 
900 
1300 
1700 
2100 
2500 
2800 
3100 
3400 
3800 
4100 
4400 
4700 
5000 
Correction is— 
When the number of seconds in which the range alters by 60 yards is— 
25 
10 
12 
14 
16 
18 
20 
22 
24 
26 
28 
30 
32 
34 
50 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
75 
— 
4 
5 
6 
6 
7 
7 
8 
9 
9 
10 
11 
11 
100 
— 
— 
— 
4 
4£ 
5 
51 
6 
6£ 
7 
n 
8 
8£ 
126 
— 
— 
— 
— 
4 
41 
5 
5 
51 
6 
6£ 
7 
160 
4 
41 
41 
5 
6£ 
H 
175 
4 
41 
41 
5 
200 
4 
H 
III.—DEFLECTION FOE TIME OF FLIGHT. 
For Eange. 
900 
1300 
1700 
2100 
2500 
2800 
3100 
J3400 
3800 
4100 
4400 
4700 
5000 
Correction is— 
When number of seconds taken by object to traverse 1 degree is— 
Mins. 
15 
8 
12 
16 
20 
24 
28 
32 
36 
40 
44 
48 
52 
56 
30 
4 
6 
8 
10 
12 
14 
16 
18 
20 
22 
24 
26 
28 
45 
2i 
4 
5} 
8 
91 
101 
13 
131 
IH 
16 
171 
181 
60 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
75 
11 
x 2 
2£ 
3 
4 
5 
51 
61 
7 
8 
9 
91 
101 
11 
90 
1 
2 
2i 
31 
4 
5 
51 
6 
61 
71 
8 
81 
91 
Note.— Fractions of a second are reckoned to the nearest half second. 
