Tuktoyaktuk and return east in a single season
Ocean A passed west through the Canadian Arctic Archipelago to Tuktoyaktuk, turned back and returned east in the same navigation season — without wintering between the two passages.
We do not describe this result as two full transits of the Northwest Passage. In R.K. Headland’s classification, a full NWP transit means a passage between the Atlantic and Pacific Oceans, including passage through Bering Strait.
In the available data independently reviewed by R.K. Headland and MCTS Iqaluit / Canadian Coast Guard, no voyage comparable to the route planned by Ocean A was found. Both sources noted, however, that the absence of such a case in the available records is not proof that it never took place.