2015-09-06
336
Vocabulary
interrogator - запрашивающее устройство elapsed time - истёкшее время handle - управлять lateral tracks - боковой курс capability - способность ATC system - air traffic control system – система управления воздушным движением VOR - VHF omnidirectional range – всенаправленный радиомаяк очень высокой частоты
Read the text
DME operates in the 960 to 1215 MHz band. The aircraft interrogator transmits pulses on one of 126 frequencies spaced 1 MHz apart. The ground beacon receives these pulses and, after a fixed delay retransmits them to the aircraft. The airborne interrogator compares the elapsed time between transmission and reception, subtracts out the fixed delay, and displays the result on a meter calibrated in nautical miles. Each beacon is designed to handle 100 aircraft.
DME which together with VOR, permits an aircraft to be navigated, if desirable, using its on-board computers, on a course parallel to the physical position of the associated ground aid. It follows that if all aircraft using an ATC system were capable of lateral tracking and if the navigational aid in use possessed a high degree of accuracy, it would be possible to separate aircraft on lateral tracks at the same height or level instead of in a line-astern configuration, which is primarily the case at present. This capability within a system is called area navigation.
Complete the sentences
1. DME stands for ….. 2. Pulses transmitted by aircraft interrogator are received by … 3. The function of the airborn interrogator is … 4. Nautical mile is a unit for measuring …. 5. Area navigation is ….
Traffic Collision Avoidance System
Read and learn the words
alert - тревога, сигнал тревоги collision - столкновение avoidance - избежание transponder - ответчик warn - предостерегать threat - угрожать appropriate - подходящий occur - случаться exist - существовать
