HIDDEN HARBOR TOURS , 90-minute tours to behind-the-scenes areas along the Brooklyn , Staten Island , Manhattan and New Jersey waterfronts , including tug yards , liner piers , dry-docks and container ports , leaving tomorrow , 11 a.m. to 4 p.m. , from Pier 63 Maritime , north of Chelsea Piers , West 23rd to 24th Streets at the Hudson River .