A rocky reef is shown running east-west and measuring 1.3km x 0.27km with a depths of 7 and 8 fathoms. The reefs causes an area of overfalls which extends to the north and south.

Sources include:
Historic Admiralty Chart 1170A-A8, RCAHMW Digital Collections sourced from UK Hydrographic Office (published 1873)

Maritime Officer, RCAHMW, October 2014.