SUPPLEMENTAL POSITIONING SYSTEM.

SEC. 219. SUPPLEMENTAL POSITIONING SYSTEM. Not later than 180 days after date of enactment of this Act, the Secretary of the department in which the Coast Guard is operating in consultation with the Commandant of the Coast Guard shall conclude their study of whether a single, domestic system is needed as a back-up navigation system to the Global Positioning System and notify the Committee on Transportation and Infrastructure of the House of Representatives and the Committee on Commerce, Science, and Transportation of the Senate the results of such determination.