33 U.S.C. § 884
Power to use books, maps, etc., and to employ persons
The President is authorized, in executing the provisions of title 56 of the Revised Statutes relating to the coast survey, to use all maps, charts, books, instruments, and apparatus belonging to the United States, and to direct where the same shall be deposited, and to employ all persons in the land or naval service of the United States, and such astronomers and other persons as he shall deem proper.