Helicopter shuttle service from the Ferry Building in San Francisco to the Candlestick Park baseball stadium. The operator is Bay Aviation Services, a member of the National Air Taxi Service scheme. The location is not the nearby Downtown Heliport, but a pier on the other side of the Ferry Building. The Downtown Heliport opened in 1956, but following the crash of a Rick Helicopters chopper it was presumably closed until San Francisco & Oakland Helicopter Airlines took off in 1961. Photo by: Marshall Moxom / SFO Museum