This page
shows a mix of pictures of some of the details from HAVHINGSTEN and
some of the construction methods.
For example,
you can see the mast partner (the solid timber on the deck in which the
mast hole is located), as well as the keelson in the bottom of the ship
where the mast is held when raised.
In addition,
you can see the typical Viking ship side rudder on the starboard side
(the “steering side”); wind vane; blocks; a horizontal piece of timber
with two holes which fastened a boom that kept the foremost bottom part
of the square ail in position when sailing up against the wind; and some
details from the uncovered interior of the ship.
On the outer
part of the oar hole plank you can see how the oar holes were closed
with a small cover to prevent water from entering when the ship was
under sail.