An Integrated System of Guns
San Francisco's harbor defenses relied on a complex system of guns, underwater mines, and antisubmarine nets. Central to the system were guns of many sizes, each with its own purpose. These guns were classified by the diameter of the projectiles they fired.
Did You Know?
Golden Gate National Parks participates in the National Park Service Passport Program. Here in our park, we have 9 different cancellation stamps available at Alcatraz, Muir Woods NM, Marin Headlands, Fort Point NHS, Presidio, Fort Mason, Cliff House, Crissy Field Center and Fort Funston.