keel+upward
11Centreboard — is similar but slides vertically rather than pivoting.FunctionA centreboard is used to provide lift to counter the lateral force from the sails. This is required for sailboats to move in directions other than downwind, since the force of the sail …
12Hogging and sagging — Hogging is the stress a ship s hull or keel experiences that causes the center of the keel to bend upward.Sagging is the stress a ship s hull or keel is placed under when a wave is the same length as the ship and the ship is in the trough of two… …
13harbours and sea works — Introduction harbour also spelled harbor any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… …
14Mary Rose — For later ships with the same name, see HMS Mary Rose. For the play by J.M. Barrie, see Mary Rose (play). The remnants of the Mary Rose undergoing conservation in Portsmouth …
15Metacentric height — Ship Stability diagram showing centre of gravity (G), centre of buoyancy (B), and metacentre (M) with ship upright and heeled over to one side. Note that for small angles, G and M are fixed, while B moves as the ship heels, and for big angles B… …
16Galley — For other uses, see Galley (disambiguation). A model of a Maltese design typical of the 16th century, the last great era of the wargalley A galley is a type of ship propelled by rowers that originated in the Mediterranean region and was used for… …
17Chesapeake Bay deadrise — Deadrise workboat Capt. Colby at Tyler s Beach near Smithfield, VA. The Chesapeake Bay deadrise is a type of traditional fishing boat used in the Chesapeake Bay. Watermen use these boats year round for everything from crabbing and oystering to… …
18Glossary of botanical terms — Many of the terms used in Wikipedia glossaries (often most) are already defined and explained within Wikipedia itself. However, lists like the following indicate where new articles need to be written and are also useful for looking up and… …
19Star and crescent — A typical presentation of the star and crescent. A star (or stars) and crescent featuring in some combination form the basis of symbols widely found across the ancient world, with examples attested from the Eastern Mediterranean and Central… …
20Container ship — Two container ships pass in San Francisco Bay Class overview Name: Container ship Subclasses: (1) Geared or gearless …
