Document ID: chunk:federal_register_of_legislation:F2024C01118:reg:3:p3
Version: federal_register_of_legislation:F2024C01118
Segment Type: reg
Provision Reference: reg 3 (pt 3/11)
Character Range: 167064–169799

of CASR as having a level of performance equivalent to the standard mentioned in paragraph (a).
       (2) When required to be operated, the relevant transponder component must transmit NACp, NIC, SIL and SDA values in accordance with the authorised capability of the GNSS position source.
       (3) The geographical position transmitted by the Mode S transponder must be determined by:
(a) a Class B TABS position source device that is authorised in accordance with (E)TSO-C199; or
(b) another source approved under Part 21 of CASR as having a level of performance equivalent to the standard mentioned in paragraph (a).
       (4) If a Mode S transponder with Class B TABS position source device transmits a SIL value of less than 2, the aircraft must not enter controlled airspace if, for such airspace, the aircraft must be fitted with, or carry, equipment that is of an approved ADS-B OUT equipment configuration.

26.28 Approved integrated TABS device — requirements
       (1) An approved integrated TABS device (the device) may only be operated in transmitting mode if the flight is conducted:
(a) below FL290; and
(b) in Class D, E or G airspace.
       (2) The device must meet the technical specifications in (E)TSO-C199 that are for a device with integrated Class A TABS and Class B TABS functionality.
       (3) The device must transmit a SIL value of 1.
       (4) The device must be authorised by the relevant NAA of the equipment manufacturer as meeting the standards mentioned in subsections (2) and (3).
Note   See subsection 26.19 (2) for an exception to the NAA authorisation requirement mentioned in subsection 26.28 (4).

26.29 Approved EC device — requirements
       (1) An EC device may only be operated in transmitting mode if the flight is conducted below FL290.
       (2) The EC device must not be operated in transmitting mode concurrently with a Mode S transponder that is also transmitting ADS-B.
Note   An EC device may be operated concurrently with a Mode A/C or a Mode S transponder (other than one that is transmitting ADS-B) but it is not a substitute for mandatory carriage of a transponder in relevant airspace.
       (3) The EC device must meet the technical specifications in UK CAP 1391, except in relation to the matters mentioned in subsections (4), (5) and (6).
       (4) The EC device must use a Class B TABS position source that complies with the performance standards specified in (E)TSO-C199.
       (5) The EC device must:
(a) be capable of transmitting a SIL value of 1, in accordance with the standards in UK CAP 1391 for an EC device that uses a Class B TABS position source; and
(b) actually transmit that SIL value of 1.
       (6) The EC device must:
(a) meet the requirements