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Dead Reckoning Error over the North Atlantic

Published online by Cambridge University Press:  18 January 2010

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Air traffic controllers separate aircraft on the North Atlantic with reference to dead reckoning (D.R.) positions of aircraft. Two such D.R. positions are transmitted to a.t.c. regularly from each aircraft, one usually 10 to 30 minutes following a fix, the other one hour's run farther ahead. The accuracy of these positions is important, since it has a direct bearing on horizontal separation standards and optimum time between position reports.

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Copyright © The Royal Institute of Navigation 1956