center-line keelson
1Junk Rig — The Junk rig, also known as the Chinese lugsail and Sampan rig, is a type of sail rig in which rigid members, called battens, span the full width of the sail and extend the sail forward of the mast. [Hasler MacLeod, Practical Junk Rig , Tiller… …
2Boat building — Boat building, one of the oldest branches of engineering, is concerned with constructing the hulls of boats and, for sailboats, the masts, spars and rigging.Parts* Bow the front and generally sharp end of the hull. It is designed to reduce the… …
3Dahlgren gun — John A. Dahlgren standing next to a 50 pounder Dahlgren Rifle aboard the U.S.S. Pawnee, 1865 …
