The ledge in the outer Salem Channel is popular for its beauty and varied topography. A trench lies between 60-and 70 feet. Large rocks end in sandy or mussel shell bottom.
Boohoo Ledge lies between PAddock Rock and Graves Island off Manchester. With two prominences that might just break the water at low tide. The ledge is approximately 200 yards long and is oriented in a north-south direction. Depths around the ledge reach 60 feet.