| 单词 | θ207671 |
| 释义 | society > travel > air or space travel > a means of conveyance through the air > aeroplane > parts of aircraft > controls and instruments > [noun] > navigational instrument (18) navigation instrument1897 pipsqueak1943 R.A.F. slang. An automatic radio transmitter in a fighter aircraft that transmits pulses to help ground crews fix its position. Now historical. black box1945 R.A.F. slang. A navigational instrument in an aircraft. Now rare. navaid1956 An electronic navigational device in an aircraft or ship. Subcategories:— specific system or device (3) — automatic pilot (7) — artificial or gyroscopic horizon (2) — device representing navigational information (1) — gyroscopically stabilized mounting for system (1) |
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