  LNM45/85 (11/5/85)-- MASSACHUSETTS-GLOUCESTER HARBOR; A SUUBMERGED OBSTRUCTION HAS BEEN REPORTED IN THE VICINITY OF POSITION LAT. 42-36-57N, LONG. 70-39-08W, BELIEVED TO BE SEVERAL LARGE BOULDERS COVERED BY 12 FEET OF WATER AT MEAN LOW WATER, (ENT 9/8/