English Channel being: length from nose to notch between the flukes of the tail, 622 in.; from the nose to the front edge of the dorsal fin, 29 in.; height of dorsal fin, 42 in.; length of base of dorsal fin, 8 in.; length of pectoral fin, 94 in.; breadth of pectoral fin, 32 in.; breadth of tail flukes, 13 in.
Thus it is used of the purchase used in raising the flukes of an anchor to the bill-board; of a piece of wood or metal used to strengthen a sprung mast or yard; and of a plate of metal used, as in railway construction, for the strengthening of the meeting-place of two rails.