 HISTORY
  H10917/00-- OPR-D392-WH; SIDE SCAN SONAR CONTACT FOUND DURING MAIN SCHEME HYDROGRAPHY.  ECHOSOUNDER DEVELOPMENT CONDUCTED TO VERIFY CONTACT'S HEIGHT AND POSITION.  ECHOSOUNDER LD OF 59.7 FEET (18.2 METERS) IN LAT. 38--49-49.83N, LONG. 75-05-1