from: Lois McNulty;
“The Leather Curragh”
The leather curragh was used for fishing, and for ferrying cows to other islands for grazing (among the Blasket and Aran Islands.) St Brendan in the 6th century was said to have used a leather curragh to cross the Atlantic from Ireland to N America!
There is a book by Tim Severin titled The Voyage of the Brendan which describes a 1976 re-enactment of this feat. (they made it!)

