A History of the Submarines Built at the
Mare Island Naval Shipyard

Exhibit by Steve Shay
Frame 2, Page 1

USS Seahorse SS-304
Balao class (No reported postmarks)
Launched January 9, 1943

Commissioning cover, unknown cachet design artist, Type Fz shipyard shore cancel.

Cover 663: Seahorse SS 304, March 31, 1943

Made eight war patrols in the Pacific during World War II. First of the Balao class to be built at Mare Island, displacement of 2,424 tons, length 311' and one deck gun; basically refined Gato design with stronger pressure hull. Tied for 5th on the honor roll (ships sunk) with 20, 12th on the honor roll (tonnage) with 72,529 tons. Decommissioned March 2, 1946, sold for scrap 1968.

 

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