  NM15/51--ESTABLISHED A BUOY TO MARK THE WRECK OF THE SS ASTRA.
  NM16/51--REINERATES ESTABLISHMENT OF THE WRECK BUOY AND NOTES THAT THE WRECK HAS MASTS SHOWING ABOVE WATER AND LIES IN A NW-SE DIRECTION.  LOCATED IN APPROXIMATELY LAT 39-20-30.00N, LONG