Granuaile is a traditional name for ships of the Irish Lighthouse Authority and it comes from the pirate Grace O'Malley . Ships of the same name were in service for the Commissioners of Irish Lights from 1948 to 1970 and from 1970 to 2000. The hull of today's Granuaile was manufactured at the shipyard belonging to the Damen Shipyards Group in Galați , Romania , equipped in the Netherlands and delivered in January 2000. The prefix of the ship's name is ILV and stands for Irish Light Vessel ( German Irish lighthouse ).