It is a large body of comparatively deep water, nearly circular in outline, and cut off from the sea by a long, low sand spit, which terminates in Point Spencer at the entrance to the bay.
The harbor at Port Clarence Bay, close to the strait, is free from ocean swell, and was the rendezvous for the Arctic whaling fleet.
There were three native settlements on the northeast side of the bay, and the dwellers assembled on Point Spencer in the early part of July for trade with the whaling vessels.
The water westward of the sand spits is shoal, but there is a channel close to the north one which can be used by vessels drawing 12 feet or less, but which should be sounded out before attempting to enter.
Fresh water can be obtained in several places in Port Clarence, the best being from a stream on the east side south of Cape Riley and bearing east-southeast from Point Spencer.
A shoal having a least reported depth of 1.5 fathoms lies nearly 5 miles offshore and about halfway between Cape Douglass and Point Spencer, and vessels should keep well outside of it.