  CGD8 LNM 39/78-- 9/13/78;   REPORTS A DANGEROUS SUBMERGED OBSTRUCTION, PA, OF A 15FT BY 10FT DIAMETER TANK SUNK IN 20 FT OF WATER IN EUGENE ISLAND BLOCK 70 IN LAT. 29/09.8 N, LON 91/49.5 W. (NAD 27). (ENTERED 12/03 BY KRW)