0 an electronic device that gives out a radio signal when it receives a similar signal telling it to:
Aircraft are required by law to carry transponders, so that they can be identified.
The only approved method of identification for such imports is by an implanted microchip transponder.
Secondly, we must introduce automatic report duty via transponders.
From that date, the parliamentary channel switched its delivery mechanism to a different transponder and at the same time digitalised and compressed the signal.
The cost of a satellite transponder would be somewhere between £2·5 million and £3·5 million for a year.
Dogs without a transponder could then be rounded up.
A trial is already taking place involving a number of vessels carrying transponders and that will produce considerable results.
Existing satellites carry up to 14 transponders, each transmitting one channel at present.
The use of transponders is hardly even considered and is certainly nowhere in use.
