Boulder Clay - clay usually containing boulders or pebbles deposited by
melting of ice; generally known as 'till'.
Carvel - form of boat-construction in which the shape of the hull is determined
by a rigid skeleton or frame which is subsequently planked, the planks laid edge-to-edge.
Caulking - insertion of material between planks to waterproof the joint.
Cleat - a projection from a timber to which other materials may be attached.
Clinker - form of boat-construction in which the strakes are placed so
that they partially overlap one another, usually with the upper outboard of the
Girth lashing - lashing of rope transversely around the hull of a boat
to clench the ends of strakes together.
Seam - juncture of two members required to be watertight, as in hull-planking.
Strake - a single plank or combination of planks stretching from one end
of a boat to the other. (Keel-strake - the central strake with up-turned
ends made up of two planks joined in the middle. Outer bottom-strake -
the strakes on either side of the keel-strake and with it forming the bottom structure.
These strakes are sometimes known as "garboard-strakes". Sheerstrake
- The topmost strake of the side of a boat. Side-strakes - lower strakes
in the hull between the bottom-structure and the sheerstrakes. In the Ferriby
case there are believed to have been two per side, making three in all.