14 U.S.C. § 541: Aids to navigation authorized

aids to maritime navigation required to serve the needs of the armed forces or of the commerce of the United States; aids to air navigation required to serve the needs of the armed forces of the United States peculiar to warfare and primarily of military concern as determined by the Secretary of Defense or the Secretary of any department within the Department of Defense and as required by any of those officials; and electronic aids to navigation systems (a) required to serve the needs of the armed forces of the United States peculiar to warfare and primarily of military concern as determined by the Secretary of Defense or any department within the Department of Defense; or (b) required to serve the needs of the maritime commerce of the United States; or (c) required to serve the needs of the air commerce of the United States as requested by the Administrator of the Federal Aviation Administration. acquire, by donation or purchase in behalf of the United States, the right to use and occupy sites for pierhead beacons; and properly mark all pierheads belonging to the United States situated on the northern and northwestern lakes, whenever the Commandant is duly notified by the department charged with the construction or repair of pierheads that the construction or repair of any such pierheads has been completed. the exercise by contract of the authority of the Coast Guard under section 81 [now 541] of title 14, United States Code, to establish, maintain, and operate aids to navigation, including a discussion of any problems involved in exercising such authority by contract, the reasons for exercising or failing to exercise such authority by contract in particular areas, and the feasibility of expanding the exercise of such authority by contract; and the advantages and disadvantages of increasing the ratio of civilian to military employees assigned to the establishment, maintenance, and operation of aids to navigation on the inland waterways of the United States.”