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2. Cumberland Pontoons - Wikipedia

   en.wikipedia.org/wiki/Cumberland_Pontoons

   Early pontoon bridges during the Civil War were heavy and awkward, and required special long-geared pontoon carriers to transport them to the site of the planned river crossing. There were two main types—the French-designed wooden bateau (known in the army as a "Cincinnati pontoon") and the Russian pontoon, a canvas boat. Both types were ...

3. Rigid inflatable boat - Wikipedia

   en.wikipedia.org/wiki/Rigid_inflatable_boat

   RNLI inshore rescue boat during Falmouth Lifeboat Day, August 2006. A rigid inflatable boat (RIB), also rigid-hull inflatable boat or rigid-hulled inflatable boat (RHIB), is a lightweight but high-performance and high-capacity boat constructed with a rigid hull bottom joined to side-forming air tubes that are inflated with air to a high pressure so as to give the sides resilient rigidity along ...

4. Fiberglass - Wikipedia

   en.wikipedia.org/wiki/Fiberglass

   Fiberglass composite boats have been made since the early 1940s, [20] and many sailing vessels made after 1950 were built using the fiberglass lay-up process. As of 2022, boats continue to be made with fiberglass, though more advanced techniques such as vacuum bag moulding are used in the construction process. [21]

5. Poly(methyl methacrylate) - Wikipedia

   en.wikipedia.org/wiki/Poly(methyl_methacrylate)

   During World War II both Allied and Axis forces used acrylic glass for submarine periscopes and aircraft windscreen, canopies, and gun turrets. Scraps of acrylic were also used to make clear pistol grips for the M1911A1 pistol or clear handle grips for the M1 bayonet or theater knifes so that soldiers could put small photos of loved ones or pin ...

6. Bimini top - Wikipedia

   en.wikipedia.org/wiki/Bimini_top

   A boat with a Bimini top. A Bimini top is an open-front canvas top for the cockpit of a boat, usually supported by a metal frame. Most Biminis can be collapsed when not in use, and raised again if shade or shelter from rain is desired. [1]

7. Chine (boating) - Wikipedia

   en.wikipedia.org/wiki/Chine_(boating)

   Chine log construction is a method of building hard-chine boat hulls. Hard chines are common in plywood hulls, while soft chines are often found on fiberglass hulls. Traditional planked hulls in most cultures are built by placing wooden planks oriented parallel to the waterflow and attached to bent wooden frames.