| Researchers are using two species in Belize, the redrump tarantula and the cinnamon tarantula, implanted with radio transponders to help monitor forest degradation. |
| It has become apparent that ACAS processors and mode S transponders have different functions, although operating together. |
| It was bulky, unwieldy and would not go far, given the cost of satellite transponders. |
| The parties further submit that ACAS processors and mode S transponders are generally bought together from the same avionics supplier. |
| Most aircraft carry transponders, devices that relay a plane's identification, altitude and speed to ground controllers. |
| It evaluates radio signals from transponders and decides whether access is authorised. |
