Related Clues:

• Airplane passengers may check them: Abbr.
• They precede thetas
• Incoming plane stats.
• Letters after upsilons
• Headwinds may affect them, briefly
• JFK stats
• In-flight estimates, for short
• St. Anthony's crosses
• Attic vowels
• Airport monitor info, for short
• Greek N's
• Some guesses, for short
• Damping ratio symbols, in engineering
• Preceders of xis
• Predicted touchdowns, for short