Petty Officer 1st Class Jesse Jarvis, a machinery technician from Coast Guard Aids-to-Navigation Team San Francisco latches a buoy in Lake Tahoe, Sept. 9, 2019. The Coast Guard is responsible for ensuring signs, symbols, buoys, markers, lighthouses, and regulations are up to date and functioning properly so recreational and commercial boaters can safely navigate the maritime environment. (U.S. Coast Guard photo by Petty Officer 2nd Class Brandon Giles/Released)