Shark cage

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Shark cage manufactured by Fibber McGee for Skip Storch's solo marathon swim attempt across the Straits of Florida from Cuba to Florida; photo by Tim Johnson
noun - A shark cage is a strongly built rectangular deterrent, supported by pontoons that is towed by an escort boat to serve as an open water swimmer's protection against sharks and other apex predators in the ocean during a marathon swim or channel swim. It can also be used by marine biologists, cameramen, and others who enter waters where there may be threats of shark sightings, shark encounters, or shark attacks. The cage can also have mesh around it in order to protect from jellyfish.

A shark proof cage is an extremely strong metal cage used by SCUBA divers and marathon swimmers to safely either (a) observe, examine or film dangerous types of sharks up close such as the Great White Shark or bull shark, or (b) swim across open bodies of water where sharks are known to exist. Shark cages are built to withstand being rammed by large, powerful sharks.

Open water swims performed with the aid of shark cages are not recognized by most governing bodies and the International Marathon Swimming Hall of Fame.

The swimmer was tossed about in the ocean by the turbulence caused by the shark cage.'

Patented Shark Cage

On 4 September 1979, US patent number 4166462 was issued for a self-propelled shark proof cage. The cage was designed to allow abalone divers to collect abalone without becoming vulnerable to attacks by sharks. With the propulsion system, the abalone divers would exert themselves less and therefore be able to collect their prey for longer periods of time. The patent abstract details a self-propelled cage with at least one access opening and a propeller mounting frame that carries both an air motor and a propeller. Buoyant objects are attached to the frame so that the cage may be made approximately the same density as saltwater.

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