![Radio Aids to Navigation. R. A. Smith. Cambridge, Engl.: at the Univ. Press; New York: Macmillan, 1948. Pp. xii + 114. (Illustrated.) $2.50. | Science Radio Aids to Navigation. R. A. Smith. Cambridge, Engl.: at the Univ. Press; New York: Macmillan, 1948. Pp. xii + 114. (Illustrated.) $2.50. | Science](https://www.science.org/cms/10.1126/science.108.2811.543.b/asset/0a14852c-5d0b-49a0-ac00-f3f5ca06b950/assets/science.108.2811.543.b.fp.png)
Radio Aids to Navigation. R. A. Smith. Cambridge, Engl.: at the Univ. Press; New York: Macmillan, 1948. Pp. xii + 114. (Illustrated.) $2.50. | Science
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ADMIRALTY NP282(1): List Of Radio Signals - Radio Aids To Navigation, Differential GPS (DGPS), Legal Time, Radio Time Signals And Electronic Position Fixing System: Europe, Africa And Asia (excluding The Far East)
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