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post #11 of Old 11-12-2009
jerryrlitton
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Example: Assume that the antenna is 50 feet above water, and the highest point of land that the vessel
is approaching is 300 feet. In this case, land can normally be observed on the radar display at a range of
approximately 30 nautical miles. A straightedge is set at point h at 50 and point H at 300, and the
expected range R reads 30.

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