Plessey Avionics and Communications
- N.B. this is part of Plessey Co
of Ilford, Essex.
1974 Managing director F. K. Chorley; sales manager avionics M. I. Dodd.
Airborne UHF/VHF transmitter/receivers— PTR175, PTR377, PTR1721 and PTR170 (UHF only); airborne integrated data acquisition and recording systems including advanced large-capacity PV740 system for the Boeing 747, PV1573 system for ARINC 573 for Concorde and wide-bodied aircraft and comprehensive flight-test systems; aircraft weapon control and stores management systems; missile guidance systems; radar altimeters; target aircraft telecommand systems. 
1989 Plessey Avionics announced a computer-based inflight entertainment and telephone system which it was offering to major airlines with no capital expenses by the airlines and profits shared; the idea has originated with a company called Candlestar and had evolved from military hardware
Later see GEC-Plessey Avionics
Sources of Information
- FLIGHT International, 29 August 1974
- The Times Sept. 1, 1989