
 HISTORY
  H10859/99-- OPR-E346-BH; UNCHARTED DANGEROUS SUBMERGED OBSTRUCTION LOCATED BY SIDE SCAN SONAR.  MULTIBEAM DEPTH OF 23 FEET OBTAINED IN LAT. 39-06-45.57N, LONG. 76-17-53.11W.  HYDROGRAPHER STATES THAT A TRUE LEAST DEPTH MAY NOT HAVE BEEN ACQ