Personnel from the Coast Guard Cutter George Cobb, a 175-foot Coastal Buoy Tender homeported in San Pedro, Calif., place a yellow, 7,800-pound buoy marking the center of the San Francisco Fleet Week 2017 security zone, Oct. 2, 2017. Mariners should monitor VHF-FM channel 16 for up-to-date information regarding fleet week safety and security zones. U.S. Coast Guard video by Petty Officer 3rd Class Sarah Wilson.