Related Clues:
- Cockpit predictions
- Letters from Thessaly
- Airplane passengers may check them: Abbr.
- They precede thetas
- Incoming plane stats.
- Headwinds may affect them, briefly
- JFK stats
- Profs.' helpers
- In-flight estimates, for short
- Attic vowels
- Airport monitor info, for short
- Sum symbols in math
- Series beginners
- Greek N's
- Some guesses, for short