Christensen made four trips to the Antarctic with her husband on the ship Thorshavn in the 1930s, becoming the first woman to see Antarctica, the first to fly over it, and-arguably-the first woman to land on the Antarctic mainland [REF].
In 1936-37 Christensen made her fourth and final trip south, with daughter Augusta Sofie Christensen, Lillemor Rachlew, and Solveig Widerøe, the 'four ladies' for whom the underwater Four Ladies Bank was named during the voyage [REF].