Argentine Antarctica observatory, where he also worked a post office was installed. Civil (employee of the Argentine company official post and telegraph) Hugo Alberto Acuna accounted hoist for the first time in an official way the flag of Argentina on the Argentine Antarctic sector, on 22 February 1904. Such an observatory became the Orcadas Base the oldest existing today across the Antarctic territory permanent human settlement. The Argentine corvette ARA Uruguay returned to Antarctica in 1905 (sailed from the port of Buenos Aires on 10 December 1904) to relieve staffing of the South Orkney and refer to Deception Island and Wiencke Island
Trondheim Airport, Jonsvatnet Trondheim Airport, Jonsvatnet Trondheim Airport, Jonsvatnet () was a water aerodrome located at Valset on the lake of Jonsvatnet in Trondheim, Norway. The airport was built as the first permanent airport serving Trondheim and initially was used for Norwegian Air Lines' (DNL) routes which commenced in 1935. Ahead of the 1936 season the airport was equipped with permanent installations, including wharfs and a small terminal building. In 1937 the airport was used by Widerøe, before DNL returned the following year. During World War II the airport was taken over by the Luftwaffe, which used the ice on the lake as