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Float glass is a sheet of glass made by floating molten glass on a bed of molten metal of a low melting point, typically tin, [1] although lead was used for the process in the past. [2] This method gives the sheet uniform thickness and a very flat surface. [ 3 ]
A float can collect data while it is neutrally buoyant or moving through the water column. Often, floats are treated as disposable, as the expense of recovering them from remote areas of the ocean is prohibitive; when the batteries fail, a float ceases to function, and drifts at depth until it runs aground or floods and sinks.
A Japanese glass fishing float. Glass floats were used by fishermen in many parts of the world to keep their fishing nets, as well as longlines or droplines, afloat.. Large groups of fishnets strung together, sometimes 50 miles (80 km) long, were set adrift in the ocean and supported near the surface by hollow glass balls or cylinders containing air to give them buoyancy.
Moored FADs occupy a fixed location and attach to the sea bottom using a weight such as a concrete block. A rope made of floating synthetics such as polypropylene attaches to the mooring and in turn attaches to a buoy. The buoy can float at the surface (lasting 3–4 years) or lie subsurface to avoid detection and surface hazards such as ...
The structure was fixed to the ocean floor, [8] though the exact system used differs depending on the source, variously being described as a single-point mooring system, [8] anchors to two ends of the ocean floor, [12] or six [7] [10] or seven [2] huge anchors, positioned in a way as to not damage the coral reef.
The 300-plus-year-old glass onion bottles were discovered from the 1715 Treasure Fleet shipwreck, located off the coast of Florida. ... the ships remained untouched in the Atlantic Ocean. Today ...
Lagan / ˈ l æ ɡ ə n / (also called "ligan") are goods cast overboard and heavy enough to sink to the ocean floor, but linked to a floating marker, such as a buoy or cork, so that they can be found again by the person who marked the item. Lagan can also be large objects trapped within the sinking vessel.
A team of engineers suggests a new theory on how Egypt’s first pyramid was built — a water elevator used to float heavy stones through the middle of the structure.