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 Between 1968 and 1970, Cliona, Maev and Macha were withdrawn from service.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, Greenwich Christopher Wren and built between 1696 and 1712, then intended to serve as the Greenwich Hospital, a home for disabled sailors. This closed in 1869, when the pensioners were transferred to other places, leaving the buildings available for a new use. The site of the former hospital had once been occupied by the medieval Palace of Placentia, or "Palace at Greenwich", begun by Humphrey, Duke of Gloucester, in 1428. After the Royal Navy departed in 1998 the buildings were opened to the public as the Old Royal Naval College. The President of the College was a full-time post until 1982