  CL1348/01-- FROM AHB TO NAUTICAL DATA BRANCH, DATED 8/01/01; DANGER TO NAVIGATION REPORT,  OPR-D307-KR, H11023
    H11023/01--OPR-D307-KR;   SUBMERGED DANGEROUS OBSTRUCTION LOCATED DURING HYDROGRAPHIC SURVEY OPERATIONS. HEIGHT OF 2.31 METERS AND A MIN