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 Between 1968 and 1970, Cliona, Maev and Macha were withdrawn from service.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 of Canada Canadian Navy dockyard at Esquimalt. Classes were also held on the Dominion Government Ship "Naden", commissioned as a tender for training in sail. The College was closed in 1922. In the years between 1922 and 1940, Canadian naval cadets went to the Royal Navy's Royal Naval College in Portsmouth. The Royal Naval College of Canada was established to impart a complete education in Naval Science. Candidates were British subjects between 14 and 16 years of age. The terms and curriculum approximated those of Naval Colleges in Britain save for the initial two year rather than three-year program which was followed