Related Clues:
- Radar screen image
- Radar-screen image
- Minor interruption
- Irregularity
- Air traffic screen sight
- Radar screen dot
- Sign of engine trouble
- ''Turandot'' role
- It's monitored by an air traffic controller
- Attention-getter in the control tower
- Tiny bump on a graph
- Unwanted engine sound
- Air traffic controller's concern
- Hiccup
- Radar notation