When should grayed-out entries in the ACL be deleted?

When should grayed-out entries in the ACL be deleted?

• A. Delete immediately.
• B. Delete only when aircraft are no longer on frequency.
• C. Use the clean up button.
• D. Always keep grayed-out entries.

Answer: (B)

Grayed-out entries show records that are no longer actively in use on that frequency but are kept visible for reference. The safest and most practical rule is to delete these entries only after the aircraft is no longer on frequency. If you delete while the aircraft might still be using or reappearing on that frequency, you could lose important context or coordination history. Purging immediately risks removing something still relevant, while always keeping them clutters the ACL, making it harder to focus on current traffic. Waiting until the aircraft is off frequency lets you clean up the list without sacrificing traceability or situational awareness.

Grayed-out entries show records that are no longer actively in use on that frequency but are kept visible for reference. The safest and most practical rule is to delete these entries only after the aircraft is no longer on frequency. If you delete while the aircraft might still be using or reappearing on that frequency, you could lose important context or coordination history. Purging immediately risks removing something still relevant, while always keeping them clutters the ACL, making it harder to focus on current traffic. Waiting until the aircraft is off frequency lets you clean up the list without sacrificing traceability or situational awareness.