  NM31/70-- CHAPEL HILL NORTH CHANNEL - BUOY - WRECK INFORMATION;  BUOY ESTABLISHED TO MARK SUBMERGED WRECK; WRECK COVERED 1/2 FOOT.
  LNM10/71-- CORRECTION; LIGHT BUOY 15A ESTABLISHED IN 18 FEET,  1,050 YARDS, 359 DEG. FROM WEST BANK LIGHT. BUOY IS 20