Manitowoc Shipbuilding Company

Shipyard President Charles C. West contacted the Bureau of Construction and Repair in 1939 to propose building destroyers at Manitowoc and transporting them through the Chicago River, Chicago Sanitary and Ship Canal, Illinois River, and Mississippi River in a floating drydock towed by the tugboat Minnesota. After evaluating the plan and surveying the shipyard, the Navy suggested building submarines instead. A contract for ten submarines was awarded on 9 September 1940. The Navy paid for lift machinery on Chicago's Western Avenue railroad bridge to clear a submarine. The 15-foot-draft submarines entered the floating drydock on the Illinois River to get through the 9-foot-deep Chain of Rocks Channel near the confluence of the Mississippi and Missouri Rivers. Submarines left the drydock at New Orleans and reinstalled periscope shears, periscopes, and radar masts which had been removed to clear bridges over the river.[2]

Manitowoc had never built a submarine before, but the first was completed 228 days before the contract delivery date. Contracts were awarded for additional submarines, and the last submarine was completed by the date scheduled for the 10th submarine of the original contract. Total production of 28 submarines was completed for $5,190,681 less than the contract price.[2][3]

SS-361 through SS-364 were initially ordered as Balao-class, and were assigned hull numbers that fall in the middle of the range of numbers for the Balao class (SS-285 through SS-416 & SS-425–426).[4] Thus, in some references they are listed with that class. However, they were completed by Manitowoc as Gatos, due to an unavoidable delay in Electric Boat's development of Balao-class drawings. Manitowoc was a follow yard to Electric Boat, and was dependent on them for designs and drawings.[5][6]

The following is a complete list of the submarines built by Manitowoc during WW II.[7][8][9][10][11][12][13][14][15] Years listed reflect launch dates.

Gato-class:

One of the 28 Manitowoc submarines produced, used in the Pacific Theater, from 2 April 1943 to the end of the war, on 15 August 1945. Two lookouts are posted next to the periscope shears. Her bow planes are rigged in, main gun visible on deck aft. Notice the limber holes and saddle ballast tanks.

• 1942 − USS Peto − sank 7 ships in 10 World War II Pacific patrols[16]
• 1942 − USS Pogy − sank 16 ships in 10 World War II Pacific patrols[16]
• 1942 − USS Pompon − sank 3 ships in 9 World War II Pacific patrols[17]
• 1942 − USS Puffer − sank 8 ships in 9 World War II Pacific patrols[18]
• 1942 − USS Rasher − sank 18 ships in 8 World War II Pacific patrols, 2nd highest tonnage sunk by a US submarine during the war[17]
• 1943 − USS Raton − sank 9 ships in 8 World War II Pacific patrols[17]
• 1943 − USS Ray − sank 14 ships in 8 World War II Pacific patrols[16]
• 1943 − USS Redfin − sank 5 ships in 7 World War II Pacific patrols[19]
• 1943 − USS Robalo − 3 World War II Pacific patrols[20]
• 1943 − USS Rock − sank 1 ship in 6 World War II Pacific patrols[21]
• 1943 − USS Golet − 2 World War II Pacific patrols[22]
• 1943 − USS Guavina − sank 5 ships in 6 World War II Pacific patrols[21]
• 1943 − USS Guitarro − sank 6 ships in 5 World War II Pacific patrols[23]
• 1943 − USS Hammerhead − sank 11 ships in 7 World War II Pacific patrols[23]

Balao-class:

• 1943 − USS Hardhead − sank 7 ships in 6 World War II Pacific patrols[18]
• 1944 − USS Hawkbill − sank 6 ships in 5 World War II Pacific patrols[18]
• 1944 − USS Icefish − sank 2 ships in 5 World War II Pacific patrols[18]
• 1944 − USS Jallao − sank 2 ships in 4 World War II Pacific patrols[16]
• 1944 − USS Kete − sank 3 ships in 2 World War II Pacific patrols[24]
• 1944 − USS Kraken − 4 World War II Pacific patrols[18]
• 1944 − USS Lagarto − sank 3 ships in 2 World War II Pacific patrols[23]
• 1944 − USS Lamprey − 3 World War II Pacific patrols[18]
• 1944 − USS Lizardfish − 2 World War II Pacific patrols[23]
• 1944 − USS Loggerhead − 2 World War II Pacific patrols[18]
• 1944 − USS Macabi − 1 World War II Pacific patrol[16]
• 1944 − USS Mapiro
• 1944 − USS Menhaden
• 1945 − USS Mero

• Shipbuilding Record