
 SURVEY REQUIREMENT COMMENTS
  SEARCH AREA LIMITED TO SOUTH OF CHANNEL

 HISTORY
  UNKNOWN SOURCE--APPLIED TO CHART IN 1952; VISIBLE PILE, SCALED ì
FROM CHART IN LAT. 27-49-27.5N, LONG. 97-09-27W. (ENT SRB 12/87)
  H10332/90-- OPR-K229-AHP; HYDROG