 The resistance movement was aware of this plan, and considered blowing up the train at various places, but instead chose to target the ferry SF "Hydro".To minimize the civilian losses, Kjell Nielsen at Norsk Hydro delayed the tapping of the potassium hydroxide one day to allow the shipment to be carried on a Sunday.On Saturday 19 February 1944 the plant director Bjarne Nilssen informed the railway that a wagon with potassium hydroxide would be sent with train number three the following day departing from Rjukan at 8