SAN FRANCISCO -- Petty Officer 1st Class William Dowell left and Petty Officer 3rd Class Isaac Adames remove an exhaust pipe from a 41-foot Utility Boat. The Station Vallejo boat is at Sector San Francisco where it can be hoisted out of the water and undergo routine maintenance. Dowell and Adames are machinery technicians from Station Vallejo and, like all machinery technicians, fix and maintain the Coast Guard's own boats. U.S. Coast Guard photo by Petty Officer 3rd Class Levi Read.