Related Clues:
- Thing on a radar screen
- Radar-screen spot
- Radar screen sound
- Sonar pulse
- Brief interruption
- Radar-screen dot
- Aircraft representation, at times
- Sonar sound
- Unfortunate motor sound
- Spot in the control tower
- Screen signal
- Bullet-against-metal sound
- Signal showing a storm's position
- Radar observation
- Aberration