Related Clues:

• Rocky Mtn. highs?
• Some computer keys
• See 12-Down
• Subs
• Cockpit data: Abbr.
• Hgts.
• Some PC keys
• Mtn. stats
• Hts.
• Computer keys: Abbr.
• Cockpit nos.
• They're rarely below zero: Abbr.
• Fliers' concerns: Abbr.
• Cockpit figs.
• Pilot's nos.