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When the sea comes in, you and your finery are ferried across by an amphibious tractor.
In that sense, the only active units in the surf zone were landing crafts, which included amphibious tractors, able to surmount a coral reef but having a limited capacity to deal with artificial obstacles.
In 1963, David Tapp, 31, drove into the sea at Kingsdown, Kent, in an amphibious tractor complete with four huge balloon tyres.