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 Between 1968 and 1970, Cliona, Maev and Macha were withdrawn from service.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
University Royal Naval Unit University Royal Naval Unit A University Royal Naval Unit (URNU) is a Royal Navy training establishment connected to a university, or a number of universities concentrated in one area. There are 15 URNUs nationwide in the UK, and each URNU has land-based facilities near the university in question, up to four training officers (members of the Royal Naval Reserve) and, with the exception of Devon, a dedicated training vessel (an "Archer"-class P2000 fast patrol boat). The units and their ships are URNU ships are part of the 1st Patrol Boat Squadron, or "1PBS". 1PBS is commanded by Commander 1PBS, who