Stonington Harbor is approached from southeastward and westward. Vessels with local knowledge sometimes cross Noyes Shoal from southwestward. Noyes Rock, 0.4 mile southward of Wamphassuc Point, has a least depth of 7 feet. Noyes Shoal, with 10 to 18 feet over it, is nearly 1.5 miles long in a west-northwesterly direction; it is marked by