Introduction
This Wiki traces and documents the avionics business developed by the Marconi company from its inception in 1909 to the present time. Although references may be made to other companies associated by merger, their businesses will not be included in this Wiki.
Company milestones relating to avionics
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1909 |
Elliott Brothers and Marconi companies both begin to fit avionics to early aircraft |
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1946 |
Marconi is acquired by English Electric |
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1954
1965
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Basildon factory opened and firstly housed Aeronautical Division's production unit. The remaining units were transferred 6 years later to 'A' Building
Closed Circuit Television Division (later renamed Electro-Optical Division) moved from Waterhouse Lane to Basildon's 'D' Building
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1967 |
English Electric and Elliott Automation merge |
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1968 |
The new English Electric group is acquired by GEC |
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1969 |
GEC renames avionics business Marconi-Elliott Avionics Systems Limited, part of the company's defence arm, GEC-Marconi |
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1978 |
Renamed Marconi Avionics Limited |
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1984 |
Renamed GEC Avionics Limited |
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1990 |
Take-over of Ferranti creating GEC Ferranti |
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1998 |
Renamed Marconi Avionics, part of the renamed defence arm, Marconi Electronic Systems (MES) |
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1999 |
MES merged with British Aerospace to form BAE Systems. Avionics business becomes BAE Systems Avionics click here for introduction |
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2005 |
BAE Systems Avionics merged with Galileo Avionica to form SELEX Sensors and Airborne Systems |
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2016
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1 January 2016, the activities of Selex ES merged into Leonardo-Finmeccanica’s Electronics, Defence and Security Systems Sector becoming Leonardo S.p.A.. |
Further details on Marconi's aviation history can be viewed in the Brooklands Wireless website available here, and a new section on the development of wireless for Civil Air Traffic Control post-World War One is being created on this wiki and linked to the related section in the Radar wiki.
There were two major divisions within Avionics: Aeronautical Division, later named Airadio, and Closed Circuit Television Division, later named Electro-Optical. For simplicity the latter nomenclature will be used for this Wiki. Both divisions were relocated to a purpose-built factory in 1954 at Basildon, Essex.
The activities for each division are summarised below:
Airadio
Civil and military airborne electronic equipment including; Automatic direction finders; Doppler navigation sensors; navigation computers and displays; VOR/ILS and DME navigation aids; HF and VHF communications equipment; Selcal selective calling system and aerial tuning units. Digital computer and moving-map display for flight navigation/control, fuel management and analogue computer systems.
An introduction to Aeronautical Division (1969) is available here.

Electro-optical Systems Division (EOSD)
Electro-optical systems for weapon guidance; night viewing television systems; closed-circuit television; educational television equipment; airport flight information presentation. A more detailed view of their applications (1969) is available here.
This activity started life at Waterhouse Lane as the Closed-circuit Television Department and was renamed Electro-optical Systems Division (EOSD) when it was transferred to Basildon in 1965. This Wiki addresses products after this date.
Further details of the Electro-Optical Systems Division (1969) are available here, and its structure within GEC in 1975 here.
Details of the Unmanned Air Vehicle or Remote Piloted Vehicle projects here
Service
Marconi have always provided a comprehensive set of services to the airline operators. These may be viewed below:
1963 click here
1964 click here.
1965 click here
1966 click here
1968 click here
Press clippings
To view a list of press clippings relating to Avionics click here.
Other documents
The Rochester Archives hold a great deal of information on Avionics history and this can be accessed here. The ones relating more to the Marconi area have been extracted and can be accessed directly from the following table, and then clicking on the link under Publisher heading. Note that some of these files are large.
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Date |
Title |
Details |
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1975 |
Marconi-Elliott Paris Air Show |
here |
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1979 |
Marconi Avionics |
here |
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Into 1980s |
GEC into the 1980s |
here |
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1980 |
Marconi Avionics Review of Activities |
here |
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1980 |
Overview of the Basildon Avionics operation |
here |
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1981 |
Marconi Avionics Review of Activities |
here |
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1981 |
GEC Review of Activities |
here |
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1981 |
Facts about Marconi Avionics |
here |
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1982 |
Marconi Avionics Sales Directory and Product Guide |
here |
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1982 |
GEC Review of Activities |
here |
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1983 |
Marconi Avionics Evening Post 83-11 |
here |
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Into 1983 |
Marconi Avionics Annual Review of Activities |
here |
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1983 |
Marconi Avionics Sales Directory and Product Guide |
here |
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1983 |
Marconi Avionics Review of Activities |
here |
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1983 |
GEC Review of Operations |
here |
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Into 1984 |
GEC Avionics |
here |
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1984 |
GEC Review of Operations |
here |
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Into 1985 |
GEC Avionics Annual Review of Activities |
here |
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1985 |
GEC Avionics Sales Directory and Product Guide |
here |
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1986 |
GEC Avionics |
here |
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Into 1986 |
GEC Avionics Review of Activities |
here |
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1987 |
Marconi Avionics Evening Post 87-10 |
here |
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Into 1987 |
GEC Avionics Review of Activities |
here |
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1987 |
GEC Avionics Sales Directory and Product Guide |
here |
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Into 1988 |
GEC Avionics Review of Activities |
here |
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Into 1989 |
GEC Avionics Review of Activities |
here |
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1990 |
GEC Avionics Sales Directory and Product Guide |
here |
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1991 |
GEC Avionics News Special |
here |
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~1993 |
GEC-Marconi Avionics Vision - issue 2 |
here |
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1998 |
Merger of Marconi Electronic Systems into BAE |
TBA |
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1999 |
Avionics organisation |
here |
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2002 |
BAE Avionics Management Team |
here |
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The listing of Avionics journals are listed here in the Marconi Family Wiki. It may be necessary for you to request access but this will be granted since you are an ex-employee of the Marconi group of companies.
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