Rigid inflatable
A small inflatable boat that has a solid hull but has buoyancy tubes that are inflated to keep it afloat.
Roaring Forties
A region between 40° South and 50° South where westerly winds circle the earth unobstructed by land.
rigid inflatable - An inflatable boat having a rigid bottom.
ring bolt - A bolt with an eye and a ring through the eye.
ring tail - The studding sail of a gaff sail.
RIB (rigid inflatable boat)
An inflatable boat fitted with a rigid bottom.
rigging
Wire cables, rods, lines, hardware and other equipment that support and control the mast and spars.
It stands for *Rigid Inflatable Boat*. How can it be rigid and inflatable at the same time?
There are several kinds: the inflatable, the hard fiberglass (usually older) and the semi-rigid - also called rigid inflatable or hard bottom (the new ones). The latter combines hard bottom and inflatable sides.
 See also: Rowboat, Halyard, Wheel, Heavy weather, Radar
  
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