About this Unit
USS **Sea Lion (APSS-315)** was originally commissioned as a Balao-class submarine in 1944 during World War II. She conducted several war patrols in the Pacific, earning two battle stars for her service, including rescuing prisoners of war and conducting special missions. After the war, she was converted into a submarine transport (APSS/LPSS) to support amphibious operations and special warfare, participating in covert training and exercises throughout the 1950s and 1960s. Sea Lion was decommissioned in 1970 after a distinguished career that showcased adaptability and innovation in submarine warfare.
Historical Facts
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USS Sea Lion (APSS-315) Origins: Originally commissioned as USS Sea Lion (SS-315), she was a Balao-class submarine built by the Electric Boat Company and launched on 20 February 1944.
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Notable Skipper: Her first commanding officer was Lieutenant Commander Eli T. Reich, who later became a Rear Admiral and was renowned for his aggressive tactics.
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Sinking of Japanese Cruiser: On 21 November 1944, Sea Lion made history by sinking the Japanese heavy cruiser ASHIGARA, becoming the only US submarine to sink an enemy cruiser during World War II.
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Wolfpack Operations: Sea Lion operated as part of coordinated “wolfpack” attacks with other submarines, a tactic that increased the effectiveness of US submarine operations.
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Rescue Missions: During her patrols, Sea Lion rescued several downed American airmen, earning her a reputation for daring and effective search-and-rescue work.
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Special Operations Conversion: In the 1950s, Sea Lion was converted to a transport submarine (APSS-315), designed for covertly delivering troops, such as Underwater Demolition Teams (UDT), which were precursors to Navy SEALs.
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Korean War Service: During the Korean War, Sea Lion supported amphibious operations, clandestinely deploying reconnaissance and demolition teams behind enemy lines.
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Cold War Role: As an APSS, Sea Lion participated in numerous secretive Cold War missions, including intelligence gathering and special forces insertions.
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Decorations: USS Sea Lion earned four battle stars for her World War II service and a Navy Unit Commendation, recognizing her extraordinary heroism and effectiveness.
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Decommissioning and Legacy: Sea Lion was decommissioned in 1969 and eventually scrapped, but her legacy lives on as one of the most versatile and storied submarines in US Navy history.
