USS O'Brien


The O'Brien class was very similar to the preceding Cassin class in many ways. Size and speed were almost identical, as was the artillery armament, but the torpedoes had been upgraded to the larger 21" calibre. They were commissioned between 1914 and 1915.

Ship data

Relative combat value: 977

Basic damage control capacity: 82%


Displacement: 1050 tons

Length: 93 m

Width: 10 m

Draught: 2 m

Standard crew: 101


Maximum speed (undamaged): 29 knots

Endurance: 5559 km

Coal capacity: 241 tons

Armour protection

Conning tower armour: 0

Hull armour: 0

Main belt armour: 0

Deck armour: 0

Best armour type: None


4 x 4in/50 Mk 7, centrally controlled. Ammo: 1200 rounds

8 x 21in Mk 8 Torpedoes, centrally controlled. Ammo: 8 torpedoes

Ships in class

  • O'Brien
  • Nicholson
  • Winslow
  • McDougal
  • Cushing
  • Ericsson

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