Yeah,
It's a Lake Superior gillnetting tug, mostly after herring now days. Most of them began their lives as open vessels and then were later enclosed to make the bad weather on Lake Superior a bit easier to take. Note the large door, there is one on the other side as well. The long gillnets are brought in on one side, picked of fish inside the boat, and payed back out through the other side door. The boat travels side ways along the net. When finished the net is already pretty much reset. Some of these boats have wood or coal stoves inside as well. Lake Superior is one very cold work environment and the men that fish it are real inovative guys.
Dan