Bulwark
The protective low structure on the sides of a ship, at the deck level.

Longship
A warship with a slim hull propelled by oars, possibly with auxiliary sails.

mortise-and tenon joint
A union of planks or timber by which a projecting piece (tenon) was fitted into one or more cavities (mortise) of corresponding size.

Skeleton-first
The method applied gradually between the 4th and 7th cent. A.D. where the frames are placed first, forming a skeleton, on which the planking is then nailed. This is the only method known after the 11th c. A.D.

tholepin
A pin or one of a pair of pins set vertically on the gunwale of a boat to serve as the fulcrum for the oar.