Related Clues:

• Bills for drinks
• Cockpit stats: Abbr.
• Soda-can attachments
• Cops may keep them on suspects
• Bar checks
• File-folder protrusions
• In-flight announcement nos.
• Bills at bars
• Cockpit readings: Abbr.
• Keep ___ on (track)
• Aid for making columns
• Alignment aids
• They're kept on situations
• Keep ___ on: monitor
• Keep ___ on (watch closely)