The first expedition took place in the summer of 1868 and was led by Carl Koldewey on the vessel Grönland. The expedition explored some hitherto unknown coastal tracts of northeastern Spitsbergen, but did otherwise not lead to any new scientific knowledge. However, it served as preparation for the second expedition.
Second German North Polar Expedition
The second expedition consisted of a two-vessel convoy:
– a schooner specifically constructed for the expedition, with a crew of 15 men commanded by Carl Koldewey
Hansa – a smaller escort schooner reinforced for the expedition, with a crew of 13 men commanded by Paul Friedrich August Hegemann
made it through the pack ice thanks to its auxiliary engine and, during late summer, explored the region around Sabine, Little Pendulum, and Shannon Island. On 13 September 1869 it was anchored near the south coast of Sabine Island for wintering. During autumn and the following spring, sledge trips were made Clavering Island and Tyrolerfjord to the south-west and as far north as Store Koldewey Island and Germania Land. In late July 1870, Germania was able to raise anchor and continue north, however, only to find the way blocked by pack ice. After eight days, it was decided to head south instead, and extensive exploration of the vast fjord systems of north-east Greenland, most notably the Kejser Franz Joseph Fjord, was undertaken. Germania managed to get through the pack ice, but the engine broke, and returned to Bremerhaven, most of the way by sail, on 11 September 1870.
''Hansa''
As the supply ship, the Hansa followed the Germania until 19 July, when Hegemann misread a flag signal by Koldewey and went ahead; the ship disappeared in the fog and got separated. The agreement was to meet in such a situation at Sabine Island. After unsuccessful attempts to get there, Hansa was inescapably stuck in the pack ice by mid-September 1869. During the next month, the ship was slowly milled by the ice and finally sank on 22 October at a position 70° 32’N, 21° W approximately 10 km from the East Greenland coast. The crew managed to survive the winter in a shelter built of coal dust briquettes, while drifting on the sea ice southward along the eastern coast of Greenland. In June 1870, the crew got to the coast by boat and finally were able to land near Cape Discord at Iluileq, a barren island off Danell Fjord in the southeastern coast. From there they followed the shore southwards until they reached the MoravianHerrnhut mission at Friedrichsthal near Cape Farewell, from where they got back to Germany on 3 September 1870 on a Danish ship.