The mystery ship is the Donaldson Lines Cordillera. The ship was built in 1920 by Short Bros, Sunderland for Donaldson South America Line. The ship was 6,865gt and measured 419ft by 54.8ft 35.7ft. Unusually, she was powered by three steam turbines. The ship remained with Donaldson Line until May 1948, when she was sold to Hector Whaling for service as a storeship and was renamed Bransfield. The location appears to be Hamburg.