1.1.  All surveillance chains referred to in Article 4(3) shall provide as a minimum the following surveillance data:

(a)  2D positional data (aircraft horizontal position);

(b)  surveillance data status:

• — cooperative/non-cooperative/combined;
• — coasted or not;

• — time of applicability of 2D positional data.

1.2.  In addition, all cooperative surveillance chains referred to in Article 4(3) shall provide as a minimum the following surveillance data:

(a)  vertical positional data (based upon pressure altitude received from the aircraft);

(b)  operational identification data (aircraft identity received from the aircraft like aircraft identification and/or Mode A code);

(c)  supplemental indicators:

— emergency indicators (i.e. unlawful interference, radio failure and general emergency);

— special position indicator;

(d)  surveillance data status (time of applicability of vertical position data).