USN:
Tang-class submarine USS Gudgeon (SS-567) underway with the shark fin arrays with the standard BQG-4 PUFFS system. Circa 1960's.
USS Tirante (SS-420) on the surface during the 1950s
USS Tirante was a Tench-class submarine commissioned in November, 1944. She is perhaps best known for an incident during her first war patrol, when on April 15, 1945, she penetrated a shallow harbor at what is now known as Jeju City, and sank a Japanese transport and two of her escorts in an action that her captain, Lt. Cdr. George Street would be awarded the Medal of Honor, one of only seven submariners to be so decorated for her actions during the Second World War.
Tirante would be credited with sinking 8 Japanese ships amounting to 15,886 tons of shipping in a time noted for a scarcity of targets.
The submarine would be laid up in reserve in 1946, but was later chosen as one of the 52 submarines modernized by the US Navy under the Greater Underwater Propulsion Power Program, being converted to the GUPPY IIA configuration. Recommissioned in November, 1952,
Tirante would spend the rest of her career operating in the North Atlantic, Mediterranean, and Caribbean until being decommissioned in October, 1974 and being sold for scrap the following year.