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Automatic Radar Plotting Systems

Published online by Cambridge University Press:  23 November 2009

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Following traditional naval tactics when outgunned, Captain Wylie laid a smoke screen in the January issue of the Journal and discussed what ‘imply’, ‘seem to think’ and ‘suggest’. Before my actual assertion becomes entirely lost to view may I repeat that a prediction of C.P.A., based only on radar data acquired in less than about three minutes, may be seriously in error. Precisely displayed, with no indication of the magnitude of the possible error, it can mislead. To say as he does that this danger is 'supposed' is certainly to beg the question, and supports my belief that the possible size of the error in C.P.A. is still not fully appreciated.

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Copyright © The Royal Institute of Navigation 1975