December 20th - On This Date - USN Submarine Service

1921 - USS S-13 (SS 118) is Launched

1933 - Keel is laid for the USS Pike (SS 173)

1939 - USS Tambor (SS 198) is Launched

1942 - USS Rasher (SS 269) is Launched

1944 - USS Menhaden (SS 377) is Launched

1957 - USS K-2 (Bass) (SS ) is Decommissioned

1963 - USS Sam Rayburn (SSBN 635) is Launched

1966 - USS Guardfish (SSN 612) is Commissioned

1971 - USS Rasher (SS 269) is decommissioned for the third and final time.

1971 - USS Requin (SS 481) is Decommissioned

1989 - USS Barb (SSN 596) is Decommissioned