An Universal Dictionary of the Marine / Or, a Copious Explanation of the Technical Terms and Phrases Employed in the Construction, Equipment, Furniture, Machinery, Movements, and Military Operations of a Ship. Illustrated With Variety of Original Designs of Shipping, in Different Situations; Together With Separate Views of Their Masts, Sails, Yards, and Rigging. to Which Is Annexed, a Translation of the French Sea-terms and Phrases, Collected from the Works of Mess. Du Hamel, Aubin, Saverien, &c.

by William Falconer

A. The keel.

B C. The line which expresses the upper-edge of the keel, from which the height of each timber, and height of its different breadths are measured.

B D and C E, perpendiculars raised on the line B C, to limit the ship’s extreme breadth and height amid-ships; or, in other words, to limit the breadth and height of the midship-frame.

A F. A perpendicular erected from the middle of the keel to bisect the line of the ship’s breadth in two equal parts.

F * 9. The half-breadth line of the aftmost top-timber; being the uppermost horizontal line in this figure.

Note. The seven lines parallel to, and immediately under this, on the right side of the line A F, are all top-timber half-breadths, abaft the midship-frame; the lowest of which coincides with the horizontal line D E.

The parallel horizontal lines nearly opposite to these, on the left side of the line A F, represent the top-timber half-breadths in the fore-body, or the half-breadths of the top-timbers before the midship-frame.

G, H, I, Q, R, S, T. The radii of the breadth-sweeps abaft the midship-frame; those of the breadth-sweeps in the fore-body, or before the midship-frame, are directly opposite on the right side.

⊕ A ⊕. The midship-frame, from the extreme breadth downwards.

1, 2, 3, 4, 5, 6, 7, 8, 9. The out-lines of timbers abaft the midship-frame, in different parts of their height.