September 7th - On This Date - RN Submarine Service

1892	Onyx	Depot Ship HMS Onyx launched
1926	Otway	Submarine HMS Otway launched
1944	Solent	Submarine HMS Solent completed
1971	Swiftsure	Submarine HMS Swiftsure launched
1766	First submarine attack	During the Revolutionary War, the American submersible craft Turtle attempts to attach a time bomb to the hull of British Admiral Richard Howe's flagship Eagle in New York Harbor. It was the first use of a submarine in warfare.
1838	Grace Darling	Grace Darling, the daughter of a lighthouse keeper, made her famous rescue of the crew of the Forfarshire, which was shipwrecked, near the Farne Islands off the Northumberland coast
1941	HMS Thunderbolt	HMS Thunderbolt torpedoes and sinks the Italian merchant Sirena about 50 miles west of Benghasi, Libya.
1942	HMS Ultimatum	HMS Ultimatum fires four torpedoes against the Italian merchant Luciano Manara in the central Mediterranean about 45 nautical miles south-west of Schiza Island, Greece. All torpedoes fired missed.
1943	HMS Shakespeare	HMS Shakespeare torpedoes and sinks the Italian submarine Velella about 18 nautical miles east of Licosa Island, south of Salerno, Italy. There were no survivors.
1977	HMS Trafalgar	Ordered from Vickers, Barrow