Related Clues:

• It's 0 deg. at the equator
• Schedule letters
• Station letters
• Part of a pilot's plan: Abbr.
• Airport approximation
• LAX letters
• Paint base
• Greek H
• In-flight P.A. announcement
• It's perpendicular to long.
• LAX guesstimate
• Guesstimate letters
• Capt.'s prediction
• Traveler's info
• Efficiency symbol, in physics