The Ocean Explorer ran aground in Alpefjord, a remote stretch of Northeast Greenland National Park, on Monday, stranding its 206 passengers and crew. How remote? The Danish Navy said its closest vessel can’t arrive to rescue them until Friday. A fishing boat’s efforts to free the ship yesterday failed. But members of the Sirius Dog Sled Patrol unit, which operates in the Arctic wilderness, have been to the ship and will be on hand to aid in the rescue. As more cruises venture to the area (they’re already up 50% from last year), dangerous and costly rescues may become more common.