Embedded system is a special-purpose computer, designed to perform a dedicated function. Embedded system is quickly growing in various fields like industrial automation, home appliances, automobiles, aeronautics etc. The main aim of this project is to prevent the collision among air flights. Many methods are available to prevent the collision between the flights, but here RF technology and Microcontroller is used which provides some additional features for future enhancement. The system uses a microcontroller to collect data from sensors on the aircraft and process it to determine the distance and velocity of other aircraft in its vicinity. The system then sends signals to other aircraft in its range through RF communication to alert them about the potential danger. In addition performance evaluation of the system, which includes the detection accuracy, response time, and communication reliability, is monitored.