Both Katja Doebbelin (played by Nadja Uhl) as well as Juergen Urban (played by 'Benno Fuermann') have blue eyes. Their common son Philipp (as it turns out later in the film) has brown eyes. This is impossible for genetic reasons.
The sign of the fire extinguisher box in the office of the drilling platform Frieda 1 follows the rule of the Health and safety at work act from 2007. In 1962 the fire extinguisher sign was only a red "F" on a white plate.