The first time we sailed the Anacostia she snarled at us and spun our boat around like a pinwheel. But on a recent Saturday afternoon, a solid southerly delivered us under the South Street Bridge right to the edge of the new Nationals Ball Park.  Up a bit farther we saw the museum ship the USS Barry.  More than 22 ships were built in the Washington Navy Yard here in the Anacostia River. Even the USS Constitution, old Ironsides, was refit there in 1812.  Today, you see mostly motor cruisers, party boats with bands and the occasional sailing scow.