The Umiak (or Angyapik), dates back at least 10,000 years.
Its now of popular belief that the first people came to the north American Continent via "the Umiak".
By putting the Umiak in the equation, this helps explain the 10,000 year discrepancies that has been brought up due to archeologic discoveries in recent years before the land bridge theory.
The Umiak was found and used from Siberia to Greenland, and many models still remain. They can be found in all these regions.