Noun
umiak (plural umiaks or umiat)
(nautical) A large, open boat made of skins stretched over a wooden frame that is propelled by paddles; used by the Eskimos for transportation.
An umiak is a large open sea canoe, ranging from convert, made with seal skins and wood. Source: Internet
The longship's design evolved over many centuries, beginning in the Stone Age with the invention of the umiak and continuing up until the 6th century with clinker built ships like Nydam and Kvalsund. Source: Internet