Article 2 Definitions

For the purpose of this Regulation the definitions in Article 2 of Regulation (EC) No 549/2004 shall apply.

The following definitions shall also apply:

1. 1..

   ‘Mode S interrogator’ means a system, composed of antenna and electronics, supporting addressing of individual aircraft through the Mode Select, known as Mode S;

2. 2..

   ‘interrogator code’ means either an interrogator identifier or a surveillance identifier code used for multisite lockout and possibly communication protocols;

3. 3..

   ‘interrogator identifier code’ (hereinafter II code) means a Mode S interrogator code with a value in the range from 0 to 15 that can be used for both multisite lockout and communications protocols;

4. 4..

   ‘surveillance identifier code’ (hereinafter SI code) means a Mode S interrogator code with a value in the range from 1 to 63 that can be used for multisite lockout protocols, but cannot be used for multisite communications protocols;

5. 5..

   ‘multisite lockout’ means the protocol that allows Mode S target acquisition and lockout by several Mode S interrogators that have overlapping coverage;

6. 6..

   ‘multisite communications protocols’ means the protocols used to coordinate, in areas of overlapping Mode S interrogators coverage, the control of communications performed in more than one transaction;

7. 7..

   ‘Mode S target’ means a platform equipped with a Mode S transponder;

8. 8..

   ‘lockout’ means the protocol that allows the suppression of Mode S all call replies from already acquired Mode S targets;

9. 9..

   ‘Mode S operator’ means a person, organisation or enterprise operating or offering to operate a Mode S interrogator, including:

   1. (a)

      air navigation service providers;

   2. (b)

      Mode S interrogators manufacturers;

   3. (c)

      airport operators;

   4. (d)

      research establishments;

   5. (e)

      any other entity entitled to operate a Mode S interrogator;

10. 10..

    ‘interrogator code allocation’ means a definition of values for at least all the key items of an interrogator code allocation as listed in Annex II, Part B;

11. 11..

    ‘interrogator code allocation system’ means a system F1..., and the associated procedures, through which a centralised service of interrogator code allocation (hereinafter interrogator code allocation service), dealing with the processing of interrogator code applications and the distribution of an interrogator code allocation plan proposal, is provided to Mode S operators through F2States participating in that service;

12. 12..

    ‘interrogator code application’ means an application from a Mode S operator for the allocation of an interrogator code;

13. 13..

    ‘interrogator code allocation plan proposal’ means a proposal for a complete set of IC allocations, submitted by the interrogator code allocation service for approval by F3States participating in that service;

14. 14..

    ‘interrogator code allocation plan’ means the most recently approved complete set of interrogator code allocations;

15. 15..

    ‘eligible Mode S interrogator’ means a Mode S interrogator for which at least one of the following conditions is satisfied:

    1. (a)

       the interrogator relies, at least partly, on Mode S all call interrogations and replies for Mode S targets acquisition; or

    2. (b)

       the interrogator locks out acquired Mode S targets in reply to Mode S all call interrogations, permanently or intermittently, in part or totality of its coverage; or

    3. (c)

       the interrogator uses multisite communications protocols for data link applications;

16. 16..

    ‘eligible interrogator code’ means any code among the II codes and the SI codes, except:

    1. (a)

       II code 0;

    2. (b)

       the interrogator code(s) reserved for military entities, including intergovernmental organisations in particular North Atlantic Treaty Organisation management and allocation;

17. 17..

    ‘Mode S all call interrogations’ means the messages that are normally used by Mode S interrogators to acquire Mode S targets entering their coverage area;

18. 18..

    ‘operational interrogator code’ means any eligible interrogator code other than II code 14;

19. 19..

    ‘competent Member State’ means:

    1. (a)

       in the case of an air navigation service provider, the Member State that has certified the provider in accordance with Commission F4Implementing Regulation (EU) No 1035/2011, as that Regulation has effect in EU law as amended from time to time;

    2. (b)

       in other cases, the Member State within the area of responsibility of which the Mode S operator operates, or intends to operate, an eligible Mode S interrogator;

20. 20..

    ‘interrogator code conflict’ means uncoordinated coverage overlap of two or more Mode S interrogators operating on the same interrogator code, potentially resulting in aircraft remaining undetected by at least one of the Mode S interrogators;

21. 21..

    ‘monitoring of interrogator code conflict’ means the implementation, by a Mode S operator, of technical or procedural means, for identifying the effects of interrogator code conflicts with other Mode S interrogators on the surveillance data provided by its own Mode S interrogators;

22. 22..

    ‘implementation sequence’ means the time-bounded sequence of implementation of interrogator code allocations with which Mode S operators need to comply to avoid temporary interrogator code conflicts;

23. 23..

    ‘matching II code’ means the II code decoded by a Mode S transponder not supporting SI codes, in a Mode S all call interrogation containing an SI code, and which is used by this transponder to encode the all call reply;

24. 24..

    ‘lockout map’ means the Mode S interrogator configuration file defining where and how to apply lockout to Mode S targets;

25. 25..

    F5“third country” means a country or territory other than:

    1. (a)

       the United Kingdom, or

    2. (b)

       a Member State.