NM.TR.105
Allocation and use of Mode S interrogator codes
Regulation (EU) 2023/1771
(a) The Network Manager shall have a procedure in place that ensures that the interrogator code allocation system:
(1) checks interrogator code applications for compliance with the applicable format and data conventions;
(2) checks interrogator code applications for completeness, accuracy, and timeliness;
(3) within maximum 6 calendar months from the date of application:
(i) performs interrogator code allocation plan update simulations on the basis of the pending applications;
(ii) prepares a proposed update of the interrogator code allocation plan for approval by the Member States affected by it;
(iii) ensures that the proposed update to the interrogator code allocation plan meets, to the greatest extent possible, the operational requirements of the interrogator code applications, as described by key items (7), (8) and (9) listed in point (b) of point CNS.TR.205;
(iv) updates, and communicates to Member States, the interrogator code allocation plan immediately after its approval, without prejudice to national procedures for the communication of information on Mode S interrogators operated by the military.
(b) The Network Manager shall take the necessary measures to ensure that military units that operate eligible Mode S interrogators on any interrogator code other than II code 0, and other codes reserved for military management, comply with the requirements on the allocation and use of Mode S interrogator codes.
(c) The Network Manager shall take the necessary measures to ensure that military units that operate Mode S interrogators on II code 0, or other interrogator codes reserved for military management, monitor the exclusive use of these interrogator codes to avoid the uncoordinated use of any eligible interrogator code (IC).
(d) The Network Manager shall take the necessary measures to ensure that the allocation and use of interrogator codes for military units has no detrimental impact on the safety of general air traffic.
EASA regulations mandate the Network Manager to manage Mode S interrogator codes, ensuring applications are compliant, accurate, and timely. Code allocation plans must be updated within six months, meeting operational needs and approved by Member States. Military units must comply with code allocation, preventing interference with general air traffic safety.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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