British Airways ethnic liveries was used on Concorde only. By 1999, BA had repainted around 170 aircraft in its new colours but then Chief Executive, Bob Ayling, announced a review of this process. The aircraft already repainted would keep the new designs, but the remainder of the fleet (still showing the pre-1997 union flag design) would receive a variant of Concorde's Union Flag design. The announcement was timed to divert some attention from Virgin's relaunch. A single 747-400 leased from British Airways to Qantas in 2000, registered as VH-NLH whilst operating in Australia, wore a hybrid livery complete with the Denmark "Wings" tail design.
Fish fin sets water or air in motion and pushes the fin in the opposite direction. Aquatic animals get significant thrust by moving fins back and forth in water. Often the tail fin is used, but some aquatic animals generate thrust from pectoral fins. Cavitation occurs when negative pressure causes bubbles (cavities) to form in a liquid, which then promptly and violently collapse. It can cause significant damage and wear. Cavitation damage can occur to the tail fins of powerful swimming marine animals, such as dolphins and tuna. Cavitation is more likely to occur near the surface of the ocean, where the