USN Submarines - On this date April 30th

1862 - Submarine Propeller is launched

1917 - Keel is laid for the USS R-15 (SS 92)

1923 - USS S-42 (SS 153) is launched

1923 - USS S-12 (SS 117) is commissioned

1926 - USS N-1 (SS 53) is decommisssioned

1926 - USS N-2 (SS 54) is decommisssioned

1926 - USS N-3 (SS 55) is decommisssioned

1938 - USS Seal (SS 183) is commissioned

1942 - USS Peto (SS 265) is launched

1943 - Keel is laid for the USS Bang (SS 385)

1944 - USS Kraken (SS 370) is launched

1945 - USS Mapiro (SS 376) is commissioned

1952 - USS Tunny (SS 282) is decommisssioned for the second time.

1983 - USS Olympia (SSN 717) is launched

1997 - USS New York City (SSN 696) is decommisssioned 

With Thanks to:  Myron Howard