Sensis Corporation’s multilateration technology, Multistatic Dependent Surveillance (MDS), has been chosen by eight air navigation service providers around the world to meet diverse wide area surveillance challenges.  MDS provides highly accurate and reliable surveillance in areas where traditional radar is too costly or not practical. MDS is also deployed as a new surveillance solution to challenges such as Precision Runway Monitoring (PRM) and enhanced TMA coverage. Sensis MDS uses low-maintenance, non-rotating sensors to triangulate/multilaterate aircraft location based on transponder signals and provides air traffic controllers with precise aircraft position and identification information regardless of weather conditions.  MDS’s flexible design and advanced software algorithms enables Sensis to deploy a system that uses an optimal number of ground stations for reduced cost and complexity. With a higher update rate and greater position accuracy than traditional surface movement radar, Sensis MDS’ distributed sensor system provides seamless, consistent, accurate surveillance performance from the airport gates to wide area and en-route as required by the application. MDS is being deployed at Detroit Metro Wayne County Airport and Sydney Airport for simultaneous approaches to closely spaced parallel runways, demonstrating that MDS meets the high update rate and accuracy demanded by Precision Runway Monitoring (PRM).