History of the Irish Naval Service started, and the ships were named "Cliona", "Maev" and "Macha". These three ships were to become a key part of the Naval Service in the 1950s and 1960s. The first formal training of Irish Naval Cadets took place at the Britannia Royal Naval College, Dartmouth, UK in 1947. Between 1968 and 1970, Cliona, Maev and Macha were withdrawn from service. These were replaced by three minesweepers commissioned in 1971: Grainne, Banba and Fola. In 1971 the Naval Service commissioned Verolme Cork Dockyard to build an offshore patrol ship. Named L.É Deirdre, it was the first naval vessel purpose-built in Ireland
Royal Naval College, Osborne Dyson was appointed as the college's director of music, on the recommendation of Sir Hubert Parry. He moved on to Marlborough College in 1911 and was succeeded by Reginald Thatcher. Paul Boissier was another member of the staff and went on to become the headmaster of Harrow School. R. P. Keigwin, a first-class cricketer and languages master, moved on to teach at Clifton College in 1919. The schoolmasters who in 1921 were left without teaching posts when the college closed were offered employment at the Royal Naval College, Greenwich. In this way, Charles Godfrey became the head of Mathematics at