LÉ Setanta (A15) was an auxiliary ship and training ship in the Irish Naval Service.[1] She was named after Sétanta (Cú Chulainn), a mythical hero of the Ulster Cycle.[citation needed]
Liffey Dockyard in Dublin built her in 1953 as a lighthouse tender for the Commissioners of Irish Lights. She was launched as Isolde,[2] named after the mythical Irish princess Iseult.
In 1976 the INS bought her, had her armed with two Oerlikon 20 mm cannon and renamed her Setanta.[2] She served until 1984 when the INS sold her to Haulbowline Industries Ltd of Cork for scrap.[3]