Herald Shoal

Herald Shoal is approximately 50 meters deep in most places. The shoal diverts warm water flowing northward from the Bering Sea and holds colder water long into the summer season, which allows sea ice to persist in this area longer. Herald Shoal is no longer covered by continuous pack ice, but along with Hanna Shoal, has some of the most reliable ice present on the entire Chukchi shelf.

Herald Shoal

Herald Shoal is approximately 50 meters deep in most places. The shoal diverts warm water flowing northward from the Bering Sea and holds colder water long into the summer season, which allows sea ice to persist in this area longer. Herald Shoal is no longer covered by continuous pack ice, but along with Hanna Shoal, has some of the most reliable ice present on the entire Chukchi shelf.