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Old May 17th 18, 01:42 AM posted to rec.aviation.soaring
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Default Reducing collision hazard at contests

As regards "leeching" (as opposed to "leaching, with reference to a soluble chemical or mineral, drain away from soil, ash, or similar material by the action of percolating liquid, especially rainwater)

Remember George Moffat's famous quote. "There just isn't a variometer like another sailplane."