Consider an aircraft to be overdue when neither communications nor RADAR contact
can be established with it and 30 minutes have passed since:
Its ETA over a specified or compulsory reporting point or at a clearance limit in
Its clearance void time
If you have reason to believe that an aircraft is overdue
before 30 minutes, take appropriate action immediately.
Overdue Aircraft Action
If an aircraft is considered overdue in the terminal environment, the terminal facility shall
forward pertinent information to the ARTCC. If the aircraft is considered overdue in the
enroute environment, the ARTCC shall forward pertinent information to the RCC and
issue an ALNOT.
The ALNOT is issued to all centers and Area B communication circuits, generally 50
miles on either side of the route of flight from the last reported position to destination. At
the recommendation of the RCC or at your discretion, the ALNOT may be issued to
cover the maximum range of the aircraft.
Responsibility Transfer to RCC
The ARTCC will transfer responsibility for further search to the RCC when one of the
Thirty minutes have elapsed after the estimated aircraft fuel exhaustion time
The aircraft has not been located within 1 hour after ALNOT issuance
The ALNOT search has been completed with negative results
The originating ARTCC shall cancel the ALNOT when the aircraft is located or the
search is abandoned.
This section provides basic coverage of the DOD NOTAM system, format, and