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Two additional chambers, located below the gunwale on either side and called "speed skags," provide cushioning for the boat's occupants and additional buoyancy in case of pressure loss in the hull. The final chamber is an inflatable keel tube which runs the length of the craft and gives the bottom of the hull a "V" shape, imparting directional ...
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 ...
A traction splint most commonly refers to a splinting device that uses straps attaching over the pelvis or hip as an anchor, a metal rod(s) to mimic normal bone stability and limb length, and a mechanical device to apply traction (used in an attempt to reduce pain, realign the limb, and minimize vascular and neurological complication) to the limb.
Aluminum and aluminum alloys are used both in sheet form for all-metal hulls or for isolated structural members. Many sailing spars are frequently made of aluminium after 1960. It is the lightest material for building large boats (being 15–20% lighter than polyester and 30% lighter than steel).
The USCG has since designed and built new aluminum 47-foot (14 m) lifeboats and the first production boat was delivered to the USCG in 1997. The 47-Foot Motor Lifeboat is able to withstand impacts of three times the acceleration of gravity, can survive a complete roll-over and is self-righting in less than 10 seconds with all machinery and ...
Reindeer, built in 1838 was at the top of the size range, at 75 ft (23 m) long (with a 12 ft (3.7 m) beam). Whilst the earlier boats had three lug-rigged masts, in common with other types of British lugger , from the middle of the 19th century the mainmast was usually dispensed with to give a dipping lug foresail and a standing lug mizzen.
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