Ten yachts tried the transverse the Northwest Passage in 2014. It is crossing north of North American from North Atlantic and Greenland west to the Bering Strait between Alaska and Russia.. Score: Three out of ten finished.
The three that are finishing: NWP 2014 Blog
… Add the Silversea Silver Explorer, a luxury cruise ship that carries 132. It started from Kangerlussuaq, Greenland on the 9th August and reached Nome, Alaska on September first, 2014. Silversea hired an ice breaker for one stretch! See Incentive Travel UK
That makes four. Any others?
More at CNN “Arctic Ambition: The race heats up."