| 单词 |
Decca |
| 释义 |
Decca|ˈdɛkə|
The name of a British company, used attrib. to designate air and sea radio-navigational systems developed by them.
1946Int. Meeting Radio Aids to Marine Navigation II. iii. xiii. 48 The Decca System of Radio Navigation consists of a number of transmitting beacon stations at fixed positions on shore, and special receiving equipment to be carried in the ship or aircraft by means of which the navigator can determine his position relative to these beacons. 1950Jrnl. Inst. Navigation III. 330 The useful range of the Decca Navigator system is about 500 miles by day,..to about 300 miles by night. 1959Observer 8 Feb. 4/5 A..flying aid invented in America and developed here—the ‘Decca Navigator’; its technical description is a ‘high accuracy hyperbolic navigation system’. This replaces the traditional string of radio beacons by a fine grid of radio signals sent out from four transmitters linked to make a Decca ‘chain’. |
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