12 
CORRECTIONS FOR QUICK TARGETS. 
TABLE VI. 
LOW TIDE. 
HIGH 
TIDE. 
r = 10' or height of 
gun 35'. 
r = 9' or height of 
gun 340 
r = 10' or height of 
gun 14 feet. 
r — 9' or height of 
gun 15 feet. 
Range. 
Correction 
Range. 
Correction 
Range. 
Correction 
Range. 
Correction 
5400-4200 
- 375 
5400-4950 
- 175 
6400—4950 
- 126 
5400-4900 
- 125 
4200-3700 
— 150 
4950-4200 
- 150 
4950-4200 
- 75 
4900 - 4200 
- 100 
3700-3200 
- 175 
4200-4100 
- 125 
4200-3700 
- 60 
4200-4100 
- 75 
3200-1800 
— 150 
4100-3200 
- 160 
3700—3200 
- 25 
4100-3200 
- 60 
1800-1600 
- 175 
3200—3000 
- 125 
3200—2400 
0 
3200-3000 
- 25 
1600-1300 
- 160 
3000—2400 
- 150 
2400-1800 
+ 60 
3000-2400 
0 
1300-1000 
- 175 
2400-2200 
- 125 
1800-1600 
+ 76 
2400-2200 
+ 25 
- 
- 
2200-1100 , 
- 150 
1600-1300 
+ 100 
2200-1600 
+ 50 
- 
- 
1100-1000 
- 175 
1300-1000 
+ 125 
1600—11C0 
+ ICO 
- 
“ 
- 
- 
- 
3100-1000 
+ 125 
This table shows that the range corrections become somewhat com¬ 
plicated under certain conditions. It can, however, only be determined 
locally how far information of the above kind can be made use of, and 
the most convenient form it should take. 
Sometimes it may be worth while to predict deflection, it can be 
done in the following way. 
Thus, as before, let G be a gun, and let GL be parallel, and GM 
perpendicular to, the general direction of a channel, and let P be the 
position of a ship, moving at speed v; then, as the latter is supposed 
