  H2833/06--OFFSHORE ROCK (BISHOP ROCK) USED AS HYDROGRAPHIC POSITION CONTROL STATION. 
  DM10302/1992-- NOS, DIGITAL TOPO COMPILATION; TWO ROCKS AWASH AND ONE BARE ROCK ( OR ISLET) SHOWN  AND NOW CHARTED. SEAWARD MOST ROCK AWASH IS CHARTED WITH AN OFFS