  CL 1488/73--COE PERMIT, 6/30/72; THREE CONCRETE DEADMAN INSTALLED IN THE THAMES RIVER NEAR GROTON, CT. POSITIONS OF DEADMEN SCALED FROM GRAPHICS IN  CL 1488/73. CHARTED POSITIONS OF THREE DEADMEN:
(1) 41°20'29.1" N  072°04'57.55" W
(2) 41°20'26.83" N