English: Plan of the Pratas Reef & Island / Mr. J. Richards Master Commg. H.M.S. Saracen Assisted by Mr. J. H. Kerr Master Commg. H.M.S. Dove and Mr. W. Blackney Assr. Payr... [et al.] H.M.S. Actaeon. Scale [ca. 1:71.000]. 5 Nautical Miles (1 inch to 6050 feet) [= 15.5 cm]