
 HISTORY
  H10994/01-- OPR-A397-WH; SWMB IDENTIFIED A 39-FOOT SOUNDING CURRENTLY CHARTED AS A 45-FOOT DEPTH IN BOSTON NORTH CHANNEL. DIVERS DESCRIBE A "DISCRETE ROCK" 2 METERS WIDE AT THE BASE AND PROJECTING 1.5 METERS OFF SURROUNDING BOTTOM.  VIS 15