| Answer | Crossword Clue |
|---|---|
| wireless | A radio receiving set |
| wirelesses | A radio receiving set |
| tune | to adjust a radio or television set so as to stop or avoid receiving (a station or channel) |
| transponder | A device for receiving a radio signal and automatically transmitting a different signal |
| transponders | A device for receiving a radio signal and automatically transmitting a different signal |
| sonobuoy | buoy that emits a radio signal on receiving an underwater signal from a vessel |
| antennae | usually metallic device (as a rod or wire) for radiating or receiving radio waves |
