after the station was damaged, the german soldiers tried to move the heavy water they had made. the german army moved the remaining heavy water to a dock on lake tinn. the heavy water was in drums that were loaded on a railroad car. they loaded the railroad cars on a ferry called the "sf hydro". norwegian resistance fighters, led by one of the commandos from operation gunnerside, were able to plant bombs on the ferry. after the ferry left the dock, the bombs exploded and the ferry sank into deep water. 18 people died on the ferry, 14 norwegian people and 4 german soldiers.