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Caption on back "Tuning up for Parade-With Oakland's skyline forming an imposing background, seven boats from the Oakland Yacht Club fleet take a trial run on the Estuary in preparaton for the Opening Day yacht parade a week from Sunday. More than 500 boats of all types are expected to take part in the 1975 parade." Photo shows section of Oakland waterfront docks with seven power boats in the foreground. Downtown skyline is in background.