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PLAIN SAILING ORIGIN

Tuesday June 29th, 2010
PLAIN SAILING
The term used to describe things running smoothly stems from a simplified method of navigation where the earth’s surface is assumed to be flat as opposed to Mercator’s sailing when the curvature of the earth’s surface is taken into account. The mathematical name for a flat surface is plane surface... hence the term ‘plane’ or ‘plain’ sailing.
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