hf direction finder
21direction finder — direc′tion find er n. rtv a receiver with a loop antenna rotating on a vertical axis, used to ascertain the direction of incoming radio waves • Etymology: 1910–15 direc′tion find ing, n …
22direction-finder — /dəˈrɛkʃən faɪndə/ (say duh rekshuhn fuynduh) noun a contrivance on a radio receiver usually based on a loop antenna rotating on a vertical axis, which ascertains the direction of incoming radio waves …
23direction finder — noun radio; determines the direction of incoming radio waves • Hypernyms: ↑receiver, ↑receiving system • Hyponyms: ↑goniometer, ↑radio compass …
24automatic direction finder — Equipment to determine the direction from which an electromagnetic signal is being generated. It can either be airborne or ground based equipment. It operates in medium or low frequencies, consists of basically a loop aerial, and gives the null… …
25direction finder — n. df, apparatus for determining the source of a conveyed signal …
26direction finder — noun a system of aerials for locating the source of radio signals, used as an aid to navigation …
27Direction finding — (DF) refers to the establishment of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication. By combining the direction information from two or more suitably spaced receivers… …
28Direction (geometry, geography) — Direction is the information contained in the relative position of one point with respect to another point without the distance information. Directions may be either relative to some indicated reference (the violins in a full orchestra are… …
29DF (direction finder) guidance — The guidance given to aircraft in distress or to other aircraft that request the service. Headings are provided to aircraft by facilities equipped with DF (direction finding) equipment. These headings, if followed, will lead the aircraft to a… …
30DF (direction finder) cloud-breaking procedure — An emergency procedure provided by an ATS (air traffic services) unit with DF (direction finding) capability to an aircraft for a descent through the clouds. The pilot must declare an emergency or accept the service offered, and there must be no… …
