Transponder : For Fishermen At Sea
The Central government has planned to install indigenously developed transponders on one lakh fishing vessels for a two-way communication and support system that enhances the safety and security of fishermen at sea.
- A transponder is a wireless communication, monitoring, or control device that picks up and automatically responds to an incoming signal.
- The term is a combination of transmitter and responder.
- Transponders are typically used for detecting, identifying, and locating objects, but they can also be used in other technologies, such as satellites to relay communications signals.
- Transponders are commonly found in both civilian and military aircraft and in objects, such as car keys.
- Transponders operate using radio frequencies and respond to wireless monitoring, communications, and control device signals.
- When sent a signal-also called an interrogator-a transponder responds by returning an identifying signal.
- The information included in the response varies depending on the type of transponder but can include location and identifying codes.
- The transponder automatically sends back a radio signal at a predetermined frequency.
- To receive and send signals simultaneously, receiving and transmitting signals must be set at different frequencies
- An air traffic controller can send an interrogator signal and receive identifying information on an aircraft.
- This enables the control tower to track the aircraft in the surrounding airspace and provide other information to help the pilots maintain adequate distance from other aircraft.
