The Kongsberg RADius 550X ATEX Certified Transponder is a part of the short-distance relative positioning system RADius, developed for use in applications where the need for a robust and highly accurate relative positioning system is crucial. The system comprises an interrogator, installed on a vessel, operating in the 5.5 GHz band and transponders that are deployed on the target. Kongsberg RADius 550X ATEX Certified Transponder has an operating range of 550 metres.