I'm not sure the tidal flow direction is plotting correctly, see image.... basically this is low tide in Lyme Bay, and the tides come in from the W, so the 0.5KT at 240 degrees looks correct tide coming in from the SW) but it's being plotted heading towards 240 degrees, which I know is the oceanographic way of doing directions....but I wonder if there's no need to do that, i.e. the data has already been adjusted?