| GENE SLOVERS US NAVY PAGES AS GUN ELEVATION INCREASES THE RANGE PATTERN DECREASES |
As Gun Elevation increases the range pattern decreases in length. The Range Chart below shows the decrease in range as gun elevation increases.
This happens because as gun elevation increases the effect of gun elevation to increase range decreases. This is especially evident when firing 9 gun
salvos.
Refer to OP 1100 Range Tables for the 16" HC 1900 pound projectile for range and gun elevations.
Let us say you fire a salvo at 30,000 yards range and the range pattern is 600 yards long. Let us start the range pattern at the 30,000 yard mark and
gun elevation at 30,000 yards is 21 degrees 28.4 minutes.
The end of the range pattern is at 30,600 yards and gun elevation is 22 degrees 13.3 minutes.
Subtract 21 degrees 28.4 minutes from 22 degrees 13.3 minutes leaves an angle of 44.9 minutes.
If you fire a salvo at 20,000 yards the gun elevation will be 11 degrees 23.6 minutes.
Add the 44.9 minutes of angle from the 600 yard pattern to the 11 degree 23.6 minute 20,000 yard range and you have a gun elevation angle of
12 degrees 8.5 minutes or a range of 20,900 yards and a range pattern of 900 yards.
You can use any length range pattern you chose and you can see how the range pattern increases and decreases in length.
You can select a range pattern or make up your own range pattern and put it anywhere in range you chose and the angle you get will tell you the
length of the range pattern at any other range in the range table.
If you do not want to do the math then look at the Trajectory Chart below and you can clearly see that as gun elevation increases the pattern size
decreases.
This happens because as gun elevation increases the effect of gun elevation to increase range decreases. This is especially evident when firing 9 gun
salvos.
Refer to OP 1100 Range Tables for the 16" HC 1900 pound projectile for range and gun elevations.
Let us say you fire a salvo at 30,000 yards range and the range pattern is 600 yards long. Let us start the range pattern at the 30,000 yard mark and
gun elevation at 30,000 yards is 21 degrees 28.4 minutes.
The end of the range pattern is at 30,600 yards and gun elevation is 22 degrees 13.3 minutes.
Subtract 21 degrees 28.4 minutes from 22 degrees 13.3 minutes leaves an angle of 44.9 minutes.
If you fire a salvo at 20,000 yards the gun elevation will be 11 degrees 23.6 minutes.
Add the 44.9 minutes of angle from the 600 yard pattern to the 11 degree 23.6 minute 20,000 yard range and you have a gun elevation angle of
12 degrees 8.5 minutes or a range of 20,900 yards and a range pattern of 900 yards.
You can use any length range pattern you chose and you can see how the range pattern increases and decreases in length.
You can select a range pattern or make up your own range pattern and put it anywhere in range you chose and the angle you get will tell you the
length of the range pattern at any other range in the range table.
If you do not want to do the math then look at the Trajectory Chart below and you can clearly see that as gun elevation increases the pattern size
decreases.
