Related Clues:

• Radioer's reply
• ''Will do''
• OK, on a walkie-talkie
• Ham's "Gotcha"
• Cockpit OK
• Pilot's ''OK''
• NASA acknowledgement
• "Message received and understood"
• Cockpit acknowledgment
• Bannister or Moore
• See 14
• He's understood to have relations
• He's OK
• Man's got the message
• Congressman's acknowledgement?