This paper presents an investigation into the application of a collision avoidance algorithm for use in Unmanned Air Vehicles (UAV) in commercial airspace. It outlines the developments within the unmanned sector of aircraft regulations, highlighting some of the studies and methodologies being developed in Europe and in the United States. It goes on to investigate a number of collision avoidance algorithms, giving some insight into their applications, as well as areas of improvement or further development. The describes the uptake of Automatic Dependent Surveillance Broadcast (ADS-B) within Australia, and how this technology will change air traffic management. The final section describes the collision avoidance algorithm which was developed and presents some of the intial data from a number of simulations. This paper concludes with some recommendations for futher work.

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