DECCA

Fletcher G. Watson, Jr.

Abstract: Decca is a radio aid to the precise navigation of ships and aircraft developed by the Decca Navigator Company, Ltd., of London. Technical information about Decca has only recently become available in the form of a brochure titled The Decca Navigator Marine. In contrast to Gee and Loran which employ pulses, Decca employs continuous waves (c.w.) on frequencies around 100 kilocycles. Hyperbolic lines of position (LOP’s) are established through measurement of the phase difference between transmissions received from paired stations. The characteristics making Decca of special interest are the very high precision obtained in the lines of position and the use of automatic dial indicators.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 1, Number 3
Pages: 42 - 46
Cite this article: Watson, Fletcher G., Jr.,, "DECCA", NAVIGATION, Journal of The Institute of Navigation, Vol. 1, No. 3, 1946, pp. 42-46.
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