As a Warfare Officer, the outcome of the mission and the safety of your ship and crew will be in your hands. As well as being a decisive leader, you’ll be a skilled seaman and navigator, able to handle your ship safely in all conditions and represent the Captain on the bridge as an Officer of the Watch.
http://www.royalnavy.mod.uk/Careers/Explore-Opportunities/Jo...

Specialist fleet training for junior warfare officers concentrates on shiphandling, seamanship and bridge watchkeeping. The initial warfare officers' (IWO) course is undertaken at the Maritime Warfare School leading to a first complement job in a surface ship. Junior submarine warfare officers undertake training at the Submarine School at HMS Raleigh in Plymouth before being appointed to a complement job in a submarine. The junior warfare officer is responsible for navigation and bridge watchkeeping, where they will ensure the navigational safety of all ship operations on behalf of the captain.
Engineer officers are responsible for the material condition of the various aspects of maritime platforms: ships, submarines and naval aircraft and as such lead teams of naval ratings to conduct preventive and corrective maintenance.

http://en.wikipedia.org/wiki/Officer_Corps_of_the_Royal_Navy

This might be a parallel case. It appears "Navigationsoffizier" establishes the rank, and "Abschnittsleiter" specifies what the person is in charge of, and there we would need more context.