A drawing of the airship «Graf Zeppelin» (LZ 127), in the air over the Arctic Sea. Fridtjof Nansen hoped that with the use of sonar, one could measure depth without having to land on the ice. One of the unresolved questions was the problem with anchoring on the ice. This is the airship that Aeroarctic, with Fridtjof Nansen in charge, was to borrow on an exploration to the arctic regions. It was going to be 30 meters long and 6 meters wide and could travel at approximately 115 km/hour under normal wind conditions.