Does anyone know if/where tide tables are available for locations along the ICW in NC? If I head south I have to pass thru the Onslow Beach swing bridge and the Surf City swing bridge. High tide I need an opening. Low tide no problem. In between in depends as I don't feel comfortable unless I have at least 13-14 feet (13 is OK but close). Tide sites I am aware of give ocean and inlet tide tables. Easier to plan if I know what I can expect.