Related Clues:
- "M*A*S*H" corporal who hears choppers before anyone else
- Kind of gun that catches speeders
- GPS predecessor
- It can detect speeders
- Acronym coined by the US Signal Corps
- ''Doppler'' device
- Extrasensory awareness
- Doppler ___ (meteorologist's tool)
- It catches major league fastballs
- Speed reader, of a sort
- Sweeper in drama school at top of road
- Speed-measuring device
- Jet-tracking device
- System for detecting things in either direction?
- Palindrome tracker?