President William Taft selected George R. Putnam to head the new bureau and he gained the title "Commissioner of Lighthouses." For 25 years, Putnam headed the bureau and during his administration, navigational aids saw a substantial increase. New technology was incorporated into the bureau's work, particularly in the area of electric aids and some automation using electricity. Though the number of aids to navigation increased substantially during Putnam's reign from 11,713 to 24,000, mostly buoys and small lights, arguably two of his most significant achievements were the passage of the Retirement Act for lighthouse personnel in 1918 and the introduction in 1921 of the radiobeacon as an aid to navigation. This new technology permitted a reduction of over 800 employees during Putnam's 25 years as head of the bureau.