MS Schwabenland (a freighter built in 1925 and renamed in 1934 after the Swabia region in southern Germany) which could also carry and catapult aircraft. The secret expedition had 33 members plus Schwabenlands crew of 24. On 19 January 1939, the ship arrived at the Princess Martha Coast, in an area which had lately been claimed by Norway as Queen Maud Land, and began charting the region. Nazi German flags were placed on the sea ice along the coast. Naming the area Neu-Schwabenland after the ship, the expedition established a temporary base and in the following weeks teams walked along the coast recording claim reservations on hills and other significant landmarks. Seven photographic survey flights were made by the ship's two Dornier Wal seaplanes named Passat and Boreas. About a dozen -long aluminum arrows, with steel cones and three upper stabilizer wings embossed with swastikas, were airdropped onto the ice at turning points of the flight polygons (these arrows had been tested on the Pasterze glacier in Austria before the expedition). None of these have ever been recovered. Eight more flights were made to areas of keen interest and on these trips, some of the photos were taken with colour film. Altogether they flew over hundreds of thousands of square kilometers and took more than 16,000 aerial photographs, some of which were published after the war by Ritscher. The ice-free Schirmacher Oasis, which now hosts the Maitri and Novolazarevskaya research stations, was spotted from the air by Richard Heinrich Schirmacher (who named it after himself) shortly before the Schwabenland left the Antarctic coast on 6 February 1939. On its return trip to Germany, the expedition made oceanographic studies near Bouvet Island and Fernando de Noronha, arriving back in Hamburg on 11 April 1939. Meanwhile, the Norwegian government had learned about the expedition through reports from whalers along the coast of Queen Maud Land. Although some, notably Norwegian writer Bjarne Aagaard and German geographer Ernst Herrmann, have claimed that Germany never actually occupied the territory, it is well documented that Germany issued a decree about the establishment of a German Antarctic Sector called New Swabia after the expedition's return in August 1939. Germany never advanced any territorial claims to the region, which were abandoned in 1945. Geographic features mapped by the expedition Because the area was first explored by a German expedition, the name Neuschwabenland (New Swabia) is still used for