USAT General Frank M . Coxe The General Frank M . Coxe is a steam ferry which was built for the United States Army to provide transportation services among several military facilities which ring California ' s San Francisco Bay . The was built in 1921 and , along with sister - ship " General John McE . Hyde " , was designed and built shortly after World War I to ferry army personnel to island bases in strategic harbors , in answer to the increasing military importance of the Pacific ports . Prior to the availability of the current system of bridges and highways in San Francisco Bay , mobility on the water was critical . It is estimated that the " General Frank M . Coxe " carried six million passengers during her military service . Design and construction . The " Coxe " was not a navy ship ; it was among the thousands of vessels owned and operated by the US Army for specific logistical purposes . It was designed by the New York firm of Cox & Stevens , who were renowned Naval Architects specializing in yachts and small commercial and military craft . The " Coxe " was built in 1922 , along with the " General John McE . Hyde " ( built 1921 ) , to Cox & Stevens design # 244 by Charles Ward Engineering Works of Charleston , West Virginia , located on the Kanawha River , a firm which specialized in shallow draft vessels such as ferries , riverboats , and tugs . ( The " Hyde " was sunk by Japanese artillery at Corregidor on April 15 , 1942 , during World War II . ) History . Military use . The " Coxe " was an active military vessel on San Francisco Bay from the 1922 to 1947 , being decommissioned and sold for surplus in 1947 after the end of World War II . Prior to the building of the $ 3 and Bay bridges in the mid - 1930s , ground transportation in the Bay Area was hampered by the Bay and the rivers which bisected the region from San Jose to the Sacramento River Delta . However , this region was heavily populated by the Army personnel who garrisoned and maintained the ring of fortresses and ancillary facilities from Fort Point and Fort Cronkite at the mouth of the Bay , to the Benicia Arsenal at the mouth of the Delta . There were two island fortresses : Fort McDowell ( Angel Island ) and Alcatraz , with each of these becoming special purpose facilities by the time of the " Coxe " . By the 1920s , Angel Island and Alcatraz were considered obsolete as artillery positions , with their purposes supplanted by larger coastal guns and extensive electronic mines as the primary coastal defenses . As aircraft developed , these also became irrelevant . Angel Island developed as a processing center for inductees and recruits , and Alcatraz developed into a maximum security military prison . The " Coxe " provided a regular service between Fort Mason , on the north coast of the San Francisco peninsula , and Fort McDowell on Angel Island , with periodic stops at Alcatraz . The Alcatraz service continued after the Army relinquished control to the Federal Prison Bureau in the mid - 1930s . Alcatraz prison break . Alcatraz Prison almost lost one of its boarders when John K . Giles , aged 50 , a mail robber and four - time convict , stole an army uniform from the prison laundry and jumped aboard the " Coxe " just before she departed for Angel Island . Although a count of both the soldiers on the " Coxe " and the prisoners working on the docks alerted the authorities to an escape , an error in communication and forged documents allowed Giles to land at Fort McDowell . However , a discrepancy in his uniform brought him to the attention of an officer , who then recognized his forged documents and arrested him not knowing of the prison break . Giles was returned to Alcatraz to serve - out his sentence . There was some controversy over whether this constituted a successful escape and a recapture , or a foiled plan . Officially , Alcatraz retained its perfect record as " escape proof " until it closed in the mid - 1960s , since it was assumed that all other missing prisoners had drowned . World War II . With the outbreak of World War II , Angel Island became a critical processing center for US troops heading to the Pacific theater of battle . The processing was substantially divided between Fort McDowell and Fort Mason , and despite the new bridges and highways , ships and ferries were the only connection between the locations . During World War II , the " Coxe " made as many as eight scheduled trips per day between Fort McDowell and Fort Mason . However , after satisfying the exigencies of the war , Fort McDowell was eventually phased - out after World War II , and was closed as a processing center prior to the Korean War . By 1947 the " Coxe " was obsolete and was decommissioned . Post military use . Tour Ferry . After her military service the " Coxe " was bought by the Golden Gate Scenic Steamship Line , which now operate the Red & White Fleet of ferry and tour boats on San Francisco Bay . The " Coxe " operated as the " SS Frank M . Coxe " as a local cruise ship and tour ferry until the 1950s . Restaurant . After retiring as an active vessel , the " Coxe " was converted to a floating restaurant called the " Showboat " and moored at Jack London Square in Oakland , California where she remained until the early 1970s . Current use . For the 16 years up until 2006 , the " General Frank M . Coxe " was a vacant hulk , until local restaurateurs bought the ship from Mr . Robert Sherman , who had preserved the " General Frank M . Coxe " on an unused canal in Burlingame , California , just south of San Francisco International Airport . The new owners obtained an extended lease from the City of Burlingame and renovated the vessel . The name of the vessel was changed from the " General Frank M . Coxe " to " The Sherman " in honor of the longtime owner , and is now operated as a restaurant of that name . It is now closed .