Mode S
Mode S Information
New Transponder Carriage Requirements
Following public consultation, the revised transponder carriage requirements came into effect on 1 January 2010 with the publication of the Air Navigation Order 2009. The Revised Carriage Requirements are published in UK AIP - GEN 1.5 - Aircraft Intruments, Equipment and Flight Documents.
To register for the Mode S Phase 1 General Exemption please complete form DAP 1901. Please note, this exemption does NOT apply to IFR flight in Notified EHS airspace, currently the London TMA.
General Mode S enquiries can be submitted to mode.s@caa.co.uk.
ICAO 24 bit Aircraft Addresses
The provision of Air Traffic Services (ATS) in an SSR Mode S environment relies on a unique ICAO 24-bit Aircraft Address (24-bit AA) for selective interrogation of individual aircraft.
Mode S in Europe
Mode S pages of the EUROCONTROL Mode S & ACAS (MSA) Programme. Including Operational and Technical Overviews and the General Aviation VFR Briefing Room.
Related Documents
Consultation material, such as AICs, EASA and JAA information relating. Impact assessments, & Low Power SSR Transponder (LPST) development.
