Battery Service Coast Guard Petty Officer 2nd Class Geoffrey Cote, from Aids to Navigation Team San Francisco, services the batteries on Alcatraz Light in San Francisco Bay, Feb. 27, 2019. SHARE IMAGE: Download Image: Full Size (1.35 MB) Tags: buoy, coast guard Photo By: Coast Guard Chief Petty Officer Marcelino Ortiz VIRIN: 190227-G-ZZ999-221E.JPG Photo Gallery