English Channel Dover and Boulogne but later also Ramsgate (Pegwell Bay) to Calais. The journey time Dover to Boulogne was roughly 35 minutes, with six trips per day at peak times. The fastest crossing of the English Channel by a commercial car-carrying hovercraft was 22 minutes, recorded by the "Princess Anne" MCH SR-N4 Mk3 on 14 September 1995, The first aircraft to cross the Channel was a balloon in 1785, piloted by Jean Pierre François Blanchard (France) and John Jeffries (US). Louis Blériot (France) piloted the first airplane to cross in 1909. The sport of Channel swimming traces its origins to the
Tradeoffs for locomotion in air and water balloons. By changing the amount of gas in these swim bladders, fish actively control their density. If they increase the amount of air in their swim bladder, their overall density will become less than the surrounding water, and increased upward buoyancy pressures will cause the fish to rise until they reach a depth at which they are again at equilibrium with the surrounding water. In this way, fish behave essentially as a hot air balloon does in air. Some seabird species utilize surface feeding or plunge diving during foraging in which gravity and/or momentum is used to counteract buoyancy effects