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.

[2] She served until 1984 when the INS sold her to Haulbowline Industries Ltd of Cork for scrap.