Technology is about to enter a boom phase.
Whereas in the past its progress was limited due to the lack of technological cost effective solutions, and therefore served largely specialised niche markets, recent developments now allow for the remaining hurdles to be overcome. RFID systems generally comprise two components, namely transponders which are attached to the goods to be labelled, and readers for reading the identity of the transponders. Todate there have been some major market developments utilising transponder technology. Aircraft identification Most commercial and general aviation aircraft operating today, are fitted with transponder systems. In addition to an identity code, the Class C type transponders also broadcast the current altitude of the aircraft determined generally from an internal airpressure sensor in the aircraft.