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#17
March 16th 04, 09:38 AM
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In article , Roy Smith wrote:
You've got to go pretty big distances before GC errors start to become significant. For example, to go from 38N/77W to 38N/122W (roughly Washington, DC to San Francisco, CA), the rhumbline is 270 and the GC is 284. 14 degrees on a coast to coast trip. The error will be less still on an aviation chart, which is a Lambert Conformal Conic projection rather than Mercator. Over the distances of a typical sectional chart, the difference between a GC and a line on the chart is irrelevant. -- Dylan Smith, Castletown, Isle of Man Flying: http://www.dylansmith.net Frontier Elite Universe: http://www.alioth.net "Maintain thine airspeed, lest the ground come up and smite thee" 
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