A Bering Air Cessna 208 Caravan carrying 10 people went missing over Alaska on Thursday afternoon while flying to Nome.
This represents some 385,000 square miles of seabed in the Pacific, Atlantic, Bering Sea and Arctic Ocean ... definition of the shelf's edge.) Deep-sea mining is one reason to expand the claim ...
It is the third major air incident to have taken place in the US over the last 10 days.