BJ uses the newly finished water vehicle from Roth to navigate the cold deep waters of the systems far below the surface of Berlin. He eventually emerges at the train depot where he must gain control of one of the engines. These stations are supply depots, so there will be heavy resistance in the form of several mechanical monstrosities to go along with the standard Nazi soldiers.
If BJ can gain control of the train, they can insert him into a hollowed out missle headed for German u-boats and they can move forward with their plans. to find the Da’at Yichud cache. http://ift.tt/1ktAZIe