I Think I Just Shot Down A Betty w/ The Deck Gun!

[NEON DEON]

Originally Posted by U-Bones

The deck guns were perfectly capable against planes.

"The 4 inch 50 caliber dual purpose cannon was standard issue to many submarines during World War II. This weapon had a muzzle velocity of 2,700 feet per second, a maximum range of 14,600 yards and was equally effective being utilized against both surface and aerial targets."

From this nice sites article on Deck Guns
http://www.valoratsea.com/arms1.htm

That is a missprint. It should have read the 3 inch 50 caliber, not 4 inch. The four inch gun was the same design used on old flush deck destroyers and had a rate of fire of only 8 to 9 rounds a minute as opposed to the 3 inch gun with a rate of fire of 15 to 20 rounds a minute and it was listed as dual purpose.

http://www.navweaps.com/Weapons/WNUS_4-50_mk9.htm