Early Patrol Submarine
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The 'O' class were built to replace the 'L' class which were considered not to have the endurance to serve in the Far East. They carried approximately 200 tons more fuel than the 'L' class which was carried in riveted exterior saddle tanks.
One of the faults with this class was the FUEL tanks which were prone to leaking and left a tell tale streak on the surface.
Odin, Olympus, Orpheus, and Oswald were war losses the survivors by 1942 were used for training.
1,320 electric motor.
1 x 4 inch gun. 2x machine gun.