Division 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):
United Kingdom
- (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.