Name StatusOfficial ValidatedFeatureRockNZ Gazette Reference2012 (53) p.1477DatumRSRGD2000GeoTag[1] PositionDescriptionA rock on the coast between Cape Tennyson and Cape Crozier, and about 7 miles east-south-east of the former, close off the north-east coast of Ross Island. Charted by the BAE, 1910-13, and named by Scott for Thomas S Williamson, RN, who as able seaman and petty officer accompanied his expeditions of 1901-04 and 1910-13.