  H11176/03--OPR-K379-KR;  FOUND AN OBSTRUCTION MEASURING 2.5 X 2.5 METERS AND NOTED AS A POSSIBLE ANCHOR OR BUOY BLOCK.  THIS OBSTRUCTION WAS FOUND IN LAT. 28/23/36.27N, LONG. 095/46/47.11W (NAD83) WITH A LEAST DEPTH OF 73.29 FEET MLLW.  (ENTERED 3/04 B