A ship named Umiak I hauls anything and everything to a nickel mine in the north of Labrador and hauls ore back, one trip per month. She's an icebreaker and leaves a 100 foot wide path of broken ice along her path. The engine is the largest engine in all of Canada and carries 8,000 gallons of oil in the engine sump. Unless there is some unexpected disaster the oil will last the lifetime of the ship. Interesting program.