File:Triple vessel invented by Patrick Miller, 1787.jpg

English: The Elevation, Section, Plan and Views, of a Triple Vessel and of Wheels, with Explanation of the Figures in the Engraving, and a short Account of the Properties and Advantages of the Invention. By Patrick Miller, Esq., of Dalswinton. Edinburgh. Printed in the year 1787.

Figure 1. – A. The Bowsprit. B. The Foremast. C. The Mainmast. D. The Mizenmast. E. The Cabin. F. The Tiller of the Centre Vessel. G. The Tiller of the Larboard Vessel. H. The Larboard Rudder. III The Rails. K. Stem of the Centre Vessel. L. Stem of the Larboard Vessel. MM. The Water Line, Marking the Vessel's draught of Water.
Figure 2. – AA. A Section of the Cabin. B. The Larboard Wheel. C. A part of the Starboard Wheel. DD. The Grooves in which the Axes of the Wheels are raised or depressed. EE. The Water Line.

Figure 3. – A Plan of the Deck, representing it without the Cabin. AAA. The Hatchways. BBBBBB. The stations of the Pumps. C. The Bowsprit. D. The station of the Foremast. E. That of the Mainmast. F. That of the Mizenmast. GG. Sections of the Wheels. HHHH. The cranks for working the Wheels. IIII. The Wells of void Spaces between the centre vessel and the two other vessels in which the wheels revolve. (N.B. By an error in the Drawing, the Wells have been made three and one half feet too long.) KKKKKKKK Open spaces in the Vessels where the men stand to work the Wheels. LL. A Circular Stage on which the helmsman stands, to steer the ship. It being raised two feet four inches above the deck, he can from thence see over the cabin, and observe objects in every direction. M. The Main Tiller. N. The Starboard Tiller. O. The Larboard Tiller. PP. The Steering Board, by which the three Tillers are connected. By its means, the centre Tiller, when moved, prodces similar movements in the other two Tillers. QQQQQQQQ The Stations of the Timber Heads and Rails. RR. The Bits to which the Cables are fastened when the ship is at anchor. SS. The Bumpkin to which the Tacks of the Foresail are extended, according to the Tack on which the ship stands.