That is about the same size boat as was on the show.
They said pine tar was still good after 1200 years on some relics they inspected.

: Hi Patrick
: I saw the Rosskilde viking boats in my home town last summer, and the
: builders put on some interesting demonstrations of technique.They
: certainly gave pine tar the thumbs up. The boat in the picture was built
: to carry 6 men and 6 sheep if I recall.
: cheers
: david