Early Patrol Submarine
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This class was also similar to the earlier 'O' or Oberon class, again larger in length and with further improvements, the 4 inch gun was mounted lower and was not fitted with a shield.
Rover was the only surviving boat of this class at the end of WWII.
1,350 electric motor.
9 kts sm
1 x 4 inch gun. 2 x machine gun.