code (SSR)

EASA defines “code (SSR)” in one regulation. The wording below is reproduced verbatim from the EASA Easy Access Rules, with a link to the paragraph it comes from.

‘code (SSR)’ means the number assigned to a particular multiple pulse reply signal transmitted by a transponder in Mode A or Mode C;

Article 2 · Standardised European Rules of the Air (SERA) · Regulation (EU) No 923/2012 · Easy Access Rules, 26 Aug 2025 revision · Read Article 2

Defined in the same article

accuracy
advisory airspace
advisory route
aerial work
aerobatic flight
aerodrome
aerodrome control service
aerodrome control tower

Ask Metis where code (SSR) applies to you →

Metis opens with Avioverse in October 2026 · request early access.