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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 lower.

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.

Copyright - Estate of Edward Wright deceased. As extracted from his booklet 'North Ferriby and the Bronze Age Boats'
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