CNS.TR.205 Allocation and use of Mode S interrogator codes

(a)     A surveillance services provider shall only operate an eligible Mode S interrogator, using an eligible interrogator code (IC), if it has received an interrogator code allocation, for this purpose, from the Member State concerned.

(b)     A surveillance services provider that intends to operate, or operates, an eligible Mode S interrogator for which no interrogator code allocation has been received, shall submit to the Member State concerned an interrogator code application, include the following key items, as a minimum:

(1)     a unique application reference from the Member State concerned;

(2)     full contact details of the Member State’s representative responsible for the coordination of the Mode S interrogator code allocation;

(3)     full contact details of the Mode S operator’s point of contact for Mode S IC allocation matters;

(4)     Mode S interrogator name;

(5)     Mode S interrogator use (operational or test);

(6)     Mode S interrogator location;

(7)     Mode S interrogator planned date of first Mode S transmission;

(8)     requested Mode S coverage;

(9)     specific operational requirements;

(10)    SI code capability;

(11)    “II/SI code operation” capability;

(12)    coverage map capability.

(c)      A surveillance services provider shall comply with the key items of the interrogator code allocations it has received, including the following items as a minimum:

(1)     the corresponding application reference from the Member State concerned;

(2)     a unique allocation reference from the interrogator code allocation service;

(3)     superseded allocation references, as required;

(4)     allocated interrogator code;

(5)     surveillance and lockout coverage restrictions under the form of sectored ranges or Mode S coverage map;

(6)     implementation period during which the allocation needs to be registered into the Mode S interrogator identified in the application;

(7)     implementation sequence which needs to be complied with;

(8)     optionally and associated with other alternatives: cluster recommendation;

(9)     specific operational restrictions, as required.

(d)     A surveillance services provider shall inform the Member State concerned at least every 6 months of any change in the installation planning or in the operational status of the eligible Mode S interrogators regarding any of the interrogator code allocation key items listed in point (c).

(e)     The surveillance services provider shall ensure that each of their Mode S interrogators uses exclusively its allocated interrogator code.