COMMUNICATIONS

5. WICK, Releases accumulated electrical charge harmlessly into the atmosphere.
7. Allows communication between different crew or maintenance stations on the aircraft|
8. Electrical charge produced by aircraft contact with rain, dust, snow, and other particles.
11. Complete range within which radio waves are categorized by frequency.
12. Exchange of information between aircraft, other aircraft, or ground stations.
13. CIRCUIT, Prevents attendant loudspeaker audio from feeding back while the attendant speaks.
15. Combines listening equipment with a microphone for crew communication.
17. Long-range radio communication that uses the ionosphere.
19. Exchanges operational, maintenance, and administrative digital information.
20. Powered microphone type that operates by changing capacitance.
23. Changes a pilot's speech into an electrical signal.
25. Switch pressed when the user wants to transmit.
28. Process of recovering information from a received carrier.
30. Provides a low-resistance electrical path between metallic aircraft components.

1. Uses satellites to relay aircraft voice and data communications.
2. Atmospheric region used to return HF radio signals toward Earth.
3. Process of placing speech or data onto a radio carrier.
4. Becomes longer as radio frequency becomes lower.
6. Equipment combining radio transmitting and receiving functions.
9. Radiates transmitted RF energy and receives radio signals.
10. OPTICS, Lightweight, high-capacity alternative to copper wiring for cabin data.
14. Short-range aircraft communication using line-of-sight propagation.
16. Alerts the crew to a call intended specifically for their aircraft.
18. PLANE, Makes a quarter-wave antenna electrically behave like a larger antenna arrangement.
21. Converts electrical energy into diaphragm vibration and sound.
22. Matches the apparent HF antenna length to the transmitted frequency.
24. Provides passenger entertainment using stored audio and video information.
26. Microphone type that moves a coil inside a magnetic field.
27. Orientation characteristic that may be vertical or horizontal for aircraft antennas.
29. Four ACARS milestones: Gate Out, Wheels Off, Wheels On, Gate In.