The presence of a tidal is annotated on an historic chart and sailing directions note 'The stream turns at the time of high and low water by the shore, at an offing of one mile the stream of spring tides runs at the rate of 5 miles per hour, and of neap tides at 3 miles per hour. The spring flood produces a strong race from the point for half a mile to the eastwards'.

Sources include:
Historic Admiralty Chart 1170-A4, RCAHMW Digital Collections sourced from UK Hydrographic Office (published 1839)
Lord Commissioners of the Admiralty, 1870, Sailing Directions for the West Coast of England, from Milford Haven to the Mull of Galloway, including the Isle of Man, pg97

Maritime Officer, RCAHMW, July 2013.