1955, Seawolf

Seawolf was the second nuclear submarine built by the US Navy. When launched, the Seawolf was fitted with a reactor using liquid sodium. Problems with this system forced Admiral Rickover to replace it with a pressurized water reactor the same as used in the Nautilus. At one time the Seawolf held the record for the number of consecutive days submerged.

Seawolf Dimensions

Length  -  337.5 feet
Beam  -  27.8 feet
Displacement  -  3740/4287 tons
Speed  -  20+ knots submerged
Test Depth  -  700 feet
Armourment  -  6-21" torpedo tubes