Phoenix Air, which recently won a $25 million contract with the US Air Force,  was also awarded a competitively bid, five-year, $10 million contract by the U.S. Navy. The contract involves specially-modified aircraft to provide range-clearing support for missile testing in the Pacific theatre.    Phoenix Air Group, which is based in Cartersville, modified and engineered a Gulfstream corporate jet which integrates the radar system, allowing the aircraft to sweep 700,000 square miles of open ocean in around 7 hours