  H10997/00 -- OPR-L316-KR; OBSTRUCTION APPEARS TO BE AN ABANDONED BOUY OR MOORING BLOCK WITH A LD OF 11 FATHOMS IN LAT.33-55-04.66, LONG.118-27-36.47 .  THERE WERE THREE OTHER CONTACTS SEEN IN THE IMMEDIATE VICINITY WITH A LD RANGING FROM 11-13 FATHOMS.