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Twenty-seven parts of an outboard runabout and nineteen of a sailboat, drawn from the side and from above and labeled one by one.

The back end of the boat, the fittings found there on an outboard runabout, and five stern shapes drawn at one scale.

The front of the boat, the fittings found there on a small powerboat, and five bow profiles drawn at one scale.

The flat surface across the stern: how the regulations define it, how transom height is measured, and where an outboard motor mounts.

The top edge of a boat’s side, cut in section so you can see it beside the sheer, the rub rail and the coaming.

One word, two meanings: the centerline backbone of every hull, and the fin under a sailboat. Five sailboat keels drawn at one scale.

What the hull is, the names of its parts, and an atlas that draws each hull form and operating mode in profile, plan and section at one scale.

The depth of the hull below the waterline, drawn on one runabout at three waterlines so you can watch it change with load.

The width of the boat at its widest point, measured two ways, drawn beside the two length figures on the same spec sheet.

The height of the side above the water, drawn on one runabout at three loads: depth minus draft, measured two ways.

The angle of the hull bottom from the horizontal. Set it on a dial, then compare four V hulls at the same two stations.

Boat and nautical terms in one sentence each, from the parts of the hull to the words used aboard and underway, with a drawing of the part wherever you can point to one.

Port is left and starboard is right when you face the bow, whichever way you happen to be standing. Drawn from above, with the sidelight colors and where the words came from.

Labeled and blank sheets of each drawing, and a blank lines-plan sheet, ready to print.

The parts of a boat on one drawing sheet: pick a part, step through the boat, test yourself.

What the site is, who it is for and who makes it.

Where to send a correction or a question, and what to include.

How the drawings are generated from data and how each fact is checked.

Every source behind the facts, page by page, with the date it was read.

How to credit the drawings, and the type and software the site uses.

What the drawings, terms and numbers can and cannot tell you.

What the site collects and what it keeps on your device.

The rules for using the site and reusing its drawings.