ROCKLAND, Maine — Under a thick cover of fog, the largest Viking ship built in modern times made its way into Rockland Harbor Sunday evening. The ship, the Draken Harald Harfagre, sailed across the Atlantic Ocean two years ago and is now embarking on its second voyage: a tour of the eastern United States, which includes several stops in Maine. While the expedition across the North Atlantic brought the 115-foot-long wooden ship through a challenging course of storms and icebergs, the ship’s crew says navigating through Maine waters has brought a new challenge. “We’ve traveled through ice and storms […] but that’s nothing compared to all the [lobster] pots we’ve encountered here,” Draken Capt.