LÉ Eithne (P31)
 LÉ Eithne (P31) is an Eithne-class ship in the Irish Naval Service. The ship is named after Eithne a tragic heroine and the daughter of the one-eyed Fomorian King Balor in an early Irish romantic tale.Eithne was originally built as a long range fisheries patrol vessel intended to be at sea for up to 19 days.