O Class Submarine

O Class Submarine

Affiliation	United States Navy
Max Displacement	520
Main Weapons	1
Sub Guns	No
Torpedo	4 tubes (forward)
Depth Charges	No
Has Camouflage	No
Cost	149000
REXP	4800
REXP Gain Rate	10%
Required Level	18
Upgraded From	Atlanta Class
Upgrades Into	S Class (USN)

The United States Navy's sixteen O-class submarines were created out of the lessons learned from the L class. The O class were about 80 tons larger than the L class, with greater power and endurance for ocean patrols. Due to the American entry into World War I the O class were built much more rapidly than previous classes, and were all commissioned in 1918. O-1 through O-10 were group 1, designed byElectric Boat, O-11 through O-16 were group 2, designed by the Lake Torpedo Boat Company and sometimes considered a separate class. The group 2 boats entered service just before the end of World War I. Eight of the group 1 boats survived to serve in World War II as training boats when they were recommissioned in 1941.

The O class were built by five shipyards: O-1 by Portsmouth Navy Yard,Kittery, Maine, O-2 by Puget Sound Navy Yard, Bremerton, Washington,O-3 through O-10 by Fore River Shipyard, Quincy, Massachusetts, O-11 through O-13 by Lake Torpedo Boat Company, Bridgeport, Connecticut, and O-14 through O-16 by California Shipbuilding (formerly Craig Shipbuilding), Long Beach, California.