  LNM23\1950--3RD CGD;  A SUBMERGED OBSTRUCTION HAS BEEN REPORTED 200 YARDS SOUTHWEST OF HUDSON RIVER LIGHTED BUOY2 IN POSITION LAT. 41/03/35N, LONG. 73/52/30W (NAD 27).  THE SUBMERGED OBSTRUCTION LOCATION IN POSITION LAT. 41/03/26.3N, LONG. 73/52/33.7W