The currach is a traditional Irish boat built from a light wooden frame covered with tarred leather or canvas. They were usually 4.80 to 5.50 m long and slightly less than 1 m wide. Depending on the purpose for which they were built and where they were built, they could be seaworthy with a keel and sail or flat as a river or coastal vessel. It is not known exactly when they first appeared on the coasts of Ireland, but they seem to have been around since the Neolithic period.
Used for fishing or transport, they could also be used for other purposes. Pytheas of Massalia is said to have used one around 340 BC during his exploration of north-western Europe. Whether he actually did so is questionable, since his account of the voyage has been lost and other ancient authors like to portray him as a liar and label his observations as fictitious. Today's researchers, however, believe him to a large extent.
Pytheas on his voyage to Thule in 340 BC, by Stephen Biesty 2011
In chapter 4 of the Navigatio Sancti Brendani, the author describes how St Brendan and his monks built a curragh for the planned sea voyage in 565 and 573 AD across the open sea to the "Isle of the Blessed". The material is described in detail: resin-soaked ox hides tanned in oak tan for the covering, ash wood for the frames and oak wood for gunwale, oars, oars and mast, all made waterproof with (sheep) fat. Then a hull was constructed from longitudinal and transverse frames joined with leather strips, the skins pulled over them and sewn together with flax fibre threads. Oars, mast, leather straps (for the shrouds and sheets), leather sails, as well as spare skins, woods and grease completed the equipment.
Book illustration Manuscriptum translationis germanicae Cod. Pal. Germ. 60, fol. 179v (University Library of Heidelberg, Germany), written around 1460 AD. St. Brendan in a currach.
A similarly constructed boat is described in the mythical tales Immram Curaig Maíle Dúin ("The Voyage of the Boat of Máel Dúin") from the 10th century and Immram Brain ("Bran's Voyage") from the 8th century.
The currach survives to this day and caused quite a stir in the 17th century when an attempt was made to recreate a seagoing one. Captain Thomas Phillips, described and drew it as follows: "A portable vessel made of wicker, commonly used by the wild Irish". The ocean-going vessel is about 6m long, has a keel and rudder, a ribbed hull and a mast in the middle of the vessel. Because of the keel, the ship is built from the bottom up. A fairing (probably made of animal skins) was added, with the sides supported by poles in the gaps.
The mast is supported by stays and double shrouds on each side, the latter sloping down to an outer plank which serves as a chain stay. The forestay runs over a small fork above the yard, which carries a square sail: a branch is tied to the top of the mast. The stern is topped by double half-rings which could support a cover.
Captain Thomas Phillips - Currach, 17th century
Phillips' sketches suggest that such a vessel was by all means common in his time and probably in use earlier. The keel would improve the handling of the boat, but the hull would remain flexible.
A modern Donegal Sea Currach
Today's currachs are sturdy, light and versatile vessels. Their framework consists of a truss formed by frames and stringers and surmounted by a gunwale. There is a stem and stern post, but no keel. For this it is rowed but can also have a mast and sail, but with a minimum of rigging. The outside of the hull is covered with tarred canvas or calico, a substitute for animal skin. They are used for, recreation, fishing, ferries and for transporting goods and livestock, including sheep and cattle.