Talk:Waterline

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I was wondering about a waterline on an aircraft, I know it exists becuase I've worked with a few manufacturing compaines. But is there an Aerospace Engineer that can really defline it strongly?

This Article really helped me - Thankyou. Is it possible to put a Full defenition of the markings on a Plimsoll line, explaining the amount of Upthrust and buoyancy each type of water Provides? It would be even more useful then! Blondie448 15:56, 31 March 2007 (GMT)

I believe that the types (densities) of water do not actually change actual buoyancy. From Buoyancy, "Thus the magnitude of the buoyant force is simply equal to the weight of the displaced fluid." Going from water densities 1.000 (fresh) to 1.025 (salt) and anywhere in between changes draft and volume of water displaced but the weight of the water displaced is the same as long as the weight of the vessel remains the same. The height of the center of buoyancy (KB) will change when using the formula of KB=.53*draft. But the sum of the buoyant forces on the hull will remain the same while the center of buoyancy and drafts change.KubalaC (talk) 02:40, 14 May 2008 (UTC)

[edit] buttock lines

I don't think this line deserves its own page. Perhaps a page describing the coordinate systems and slicing of a ship in order to come up with the lines drawing (no clue what the name of such an article might be), but the buttock line is really just a definition.

I took a couple semester of Naval architecture so I could write such an article, but I don't know what to call it. It might even fit under a subsection of another page. Suggestions?--Dj245 04:16, 3 December 2007 (UTC)