SAN FRANCISCO (Standard&Poor's) April 24, 2014--Standard&Poor's Ratings Services revised its outlook to positive from stable and affirmed its 'A-' long-term rating on the San Francisco City&County Port Commission, Calif.'s revenue bonds, issued for the Port of San Francisco. At the same time, Standard&Poor's assigned its 'A-' long-term rating on the port commission's series 2014A and 2014B revenue bonds. The outlook is positive. "The positive outlook reflects our view of the port's continued strong debt service coverage and strong liquidity position," said Standard&Poor's credit analyst Robert Hannay. "If coverage and liquidity remain good to strong, even with increased annual debt service, and if the port can continue investing in its assets