MSO San Francisco Bay

**MSO San Francisco Bay** refers to a Mine Sweeper, Ocean (MSO) unit that operated in the San Francisco Bay area. Commissioned during the Cold War era, these wooden-hulled minesweepers were designed to detect and clear naval mines, ensuring safe passage for military and commercial vessels. The unit conducted routine patrols, training exercises, and supported fleet operations from the late 1950s through the 1970s. MSO San Francisco Bay played a vital role in maintaining harbor security and readiness on the U.S. West Coast before being gradually phased out as mine countermeasure technology advanced.