Which phrase is used to indicate a position verification when verified by position data or an inoperative transponder?

• A. (ACID) Radar contact
• B. Radar contact
• C. ACID, position verified
• D. Position confirmed

Answer: (A)

When radar identification and position verification are in play, controllers use a specialized phrase to show that the aircraft has been identified and its position is established. The tag ACID before radar contact signals that the aircraft has been identified on radar (Aircraft Identified) and that the position has been verified, which is particularly relevant when the verification comes from position data or when the transponder is inoperative.

This makes the phrase with ACID the best choice because it explicitly communicates both identification and verified position, whereas plain radar contact does not indicate how identity was established. The other options either lack the identification verification indication or use nonstandard phrasing for this situation.