Irish Naval Service as a permanent component of the Irish Defence Forces. The Naval Service purchased three s from the United Kingdom in 1946 and 1947. The tradition of naming Irish Naval Ships after figures in Celtic Mythology began, and the ships were named , and . 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. In 1970, "Cliona" and "Macha" were withdrawn from service and scrapped, leaving "Maev" as the sole ship in
Midshipman longer the case that those joining the Navy as university graduates start as sub-lieutenants, with non-graduates joining as midshipmen. Graduates and non-graduates all start as midshipmen, and wait to be promoted at the same time. General basic training (initial officer training) for Royal Navy officers takes place at the Britannia Royal Naval College. Training takes up to a year depending on specialisation; all midshipmen participate in at least the first two terms, which are 14 weeks each. Until they have completed initial fleet training, both midshipmen and sub-lieutenants at Britannia Royal Naval College do not use their substantive ranks, but