1. The minimum capability for the secondary surveillance transponder shall be Mode S Level 2 meeting the performance and functionality criteria of Annex 10 to the Chicago Convention, Volume IV, Third Edition including all amendments up to No 77.

2. Each implemented transponder register shall be compliant with the corresponding section of ICAO document 9871 (2nd edition).

3. The following data items shall be made available to the transponder and be transmitted by the transponder via Version 2 of the extended squitter (ES) ADS-B protocol in accordance with the formats specified in ICAO document 9871 (2nd edition):

(a)  24-bit ICAO aircraft address;

(b)  aircraft identification;

(c)  Mode A code;

(d)  special position indication (SPI) using the same source as for the same parameter specified in Part A;

(e)  emergency status (general emergency, no communications, unlawful interference) using the same source as for the same parameter specified in Part A;

(f)  ADS-B version number (equal to 2);

(g)  ADS-B emitter category;

(h)  geodetic horizontal position in accordance with the world geodetic system revision 1984 (WGS84) latitude and longitude, both while airborne or on the ground;

(i)  geodetic horizontal position quality indicators (corresponding to the integrity containment bound (NIC), 95 % navigation accuracy category for position (NACp), source integrity level (SIL) and system design assurance level (SDA));

(j)  pressure altitude using the same source as for the same parameter specified in Part A;

(k)  geometric altitude in accordance with the world geodetic system revision 1984 (WGS84), provided in addition and encoded as a difference to pressure altitude;

(l)  geometric vertical accuracy (GVA);

(m)  velocity over ground, both while airborne (east/west and north/south airborne velocity over ground) or on the ground (surface heading/ground track and movement);

(n)  velocity quality indicator corresponding to navigation accuracy category for velocity (NACv);

(o)  coded aircraft length and width;

(p)  global navigation satellite system (GNSS) antenna offset;

(q)  vertical rate: barometric vertical rate using the same source as for the same parameter specified in the data item in point 2 (g) of Part C when the aircraft is required and capable to transmit this data item via the Mode S protocol, or Global Navigation Satellite System (GNSS) vertical rate;

(r)  mode control panel/flight control unit (MCP/FCU) selected altitude using the same source as for the same parameter specified in Part C when the aircraft is required and capable to transmit this data item via the Mode S protocol;

(s)  barometric pressure setting (minus 800 hectoPascals) using the same source as for the same parameter specified in Part C when the aircraft is required and capable to transmit this data item via the Mode S protocol;

(t)  ACAS active resolution advisories when the aircraft is equipped with TCAS II using the same source as for the same parameter specified in Part A.

4. Surveillance data items (the data items in point 3(h), (k) and (m)) and their quality indicator data items (the data items in point 3(i), (l) and (n)) shall be provided to the transponders on the same physical interface.

5. The data source connected to the transponder and providing the data items in point 3(h) and (i) shall meet the following data integrity requirements:

(a)  horizontal position (data item in point 3(h)) source integrity level (SIL, expressed with respect to NIC) shall be equal to or less than 10-7 per flight-hour;

(b)  horizontal position (data item in point 3(h)) integrity time to alert (leading to a change of the NIC quality indicator), if on-board monitoring is required to meet the horizontal position source integrity level, shall be equal to or less than 10 seconds.

6. The primary data source providing the data items in point 3(h) and (i) shall be at least compatible with GNSS receivers that perform receiver autonomous integrity monitoring (RAIM) and fault detection and exclusion (FDE), along with the output of corresponding measurement status information, as well as integrity containment bound and 95 % accuracy bound indications.

7. The system integrity level of the data sources providing the data items in point 3(f), (g), (k) to (p) shall be equal to or less than 10-5 per flight-hour.

8. The quality indicator information (NIC, NACp, SIL, SDA, NACv and GVA) (the data items in point 3(i), (l) and (n)) shall express the actual performance of the selected data source as valid at the time of applicability of the measurement of the data items in point 3(h), (k) and (m)).

9. With respect to the processing of the data items in point 3(a) to (t), the transponder system integrity level for the extended squitter ADS-B protocol, including any interconnecting avionics to the transponder, shall be equal to or less than 10-5 per flight-hour.

10. The total latency of the horizontal position data (the data items in point 3(h) and (i)) shall be equal to or less than 1,5 second in 95 % of all transmissions.

11. The uncompensated latency of the horizontal position data (data item in point 3(h)) shall be equal to or less than 0,6 second in 95 % of the cases and shall be equal to or less than 1,0 second in 99,9 % of all transmissions.

12. The total latency of the ground speed data items (the data items in point 3(m) and (n)) shall be equal to or less than 1,5 second in 95 % of all transmissions.

13. If the transponder is set to use a Mode A conspicuity code of 1000 then the broadcast of Mode A code information via the extended squitter ADS-B protocol shall be inhibited.

14. Other data items may be made available to the transponder.

15. Except for military reserved formats, the data items referred to in point 14 shall only be transmitted by the transponder via the extended squitter ADS-B protocol. The aircraft and equipment certification process shall cover the transmission of these data items.

16. Provision repealed before document was retained.