This vintage negative captures Alcatraz Island as seen from a U.S. Navy vessel crossing San Francisco Bay during the Second World War. Ships such as the escort carrier USS Petrof Bay (CVE-80) regularly transited these waters en route to or from Pacific deployment, and sailors often photographed the iconic island and its federal penitentiary as a farewell or homecoming landmark. The image reflects both the strategic importance of San Francisco Bay as a wartime naval hub and the personal, everyday photography of servicemen documenting their voyages. Project: 218389