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20 MM Gun System
This information was provide by the USS WASHINGTON BB56
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Location of 20mm Mounts


 
 
 
 
 
 
 
Barrels 20-65
Mounts 20-65
Projectile Weight 4.3 ounces
Muzzle Velocity 2,740 feet per second
Range Surface
Barrel Elevation = 35 deg.		 4,800 yards (2.7 miles)
Anti Aircraft
Barrel Elevation = 90 deg.		 10,000 yards (5.7 miles)
Firing Cycle 450 rounds per minute or 7.5 per second

 
 
 
 
 
 
 
 

This is the 20mm single mount with the
Splinter Shield removed. They were used
as the last defense when a plane got
past the 5-inch and the 40mm guns.
Click on photo for full view
Here are the 20mm Guns with Splinter
Shields in place. The gunsights on this photo
were scratched out by Censors because
they were top secret at the time!

 
 
 
 
 


20MM MK 67


 
 
 
 
 
 
 
Weapons 16 Inch
Armament		 5"MK 38
System		 5"MK 42
System		 5"MK 45
System		 5"62 
System		 40MM 
System
76MM
System		 3"50
System		 MK 38
System		 20MM
System		 Standard
Missile		 Tomahawk
Missile