20th meridian west in the context of "160th meridian east"

Norway has three dependent territories (Norwegian: biland), all uninhabited and located in the Southern Hemisphere. Bouvet Island (Bouvetøya) is a sub-Antarctic island in the South Atlantic Ocean. Queen Maud Land is the sector of Antarctica between the 20th meridian west and the 45th meridian east. Peter I Island is a volcanic island located 450 kilometres (280 mi) off the coast of Ellsworth Land of continental Antarctica. Despite being unincorporated areas, neither Svalbard nor Jan Mayen is formally considered a dependency. While the Svalbard Treaty regulates some aspects of that Arctic territory, it acknowledges that the islands are part of Norway. Similarly, Jan Mayen is recognized as an integral part of Norway.

Both Peter I Island and Queen Maud Land are south of 60°S and are thus part of the Antarctic Treaty System. While the treaty does not affect these claims, the only states that recognize Norwegian sovereignty also have Antarctic claims. Administration of the dependencies is handled by the Polar Affairs Department of the Ministry of Justice and Public Security in Oslo. Norwegian criminal law, private law and procedural law apply to the dependencies, as do other laws that explicitly state they are valid on the dependencies.

Queen Maud Land (Norwegian: Dronning Maud Land) is a roughly 2.7-million-square-kilometre (1.0-million-square-mile) region of Antarctica claimed by Norway as a dependent territory. It borders the claimed British Antarctic Territory 20° west, specifically the Caird Coast, Coats Land on the West, and the Australian Antarctic Territory 45° east, specifically Enderby Land on the East. In addition, a small unclaimed area from 1939 was annexed in June 2015. Positioned in East Antarctica, it makes out about one-fifth of the continent, and is named after the Norwegian Queen Maud (1869–1938).

In 1930, the Norwegian Hjalmar Riiser-Larsen was the first person known to have set foot in the territory. On 14 January 1939, the territory was claimed by Norway. On 23 June 1961, Queen Maud Land became part of the Antarctic Treaty System, making it a demilitarised zone. It is one of two Antarctic claims made by Norway, the other being Peter I Island. They are administered by the Polar Affairs Department of the Norwegian Ministry of Justice and Public Security in Oslo.

The British Antarctic Territory (BAT) is a sector of Antarctica claimed by the United Kingdom as one of its 14 British Overseas Territories, of which it is by far the largest by area. It comprises the region south of 60°S latitude and between longitudes 20°W and 80°W, forming a wedge shape that extends to the South Pole, overlapped by the Antarctic claims of Argentina (Argentine Antarctica) and Chile (Chilean Antarctic Territory). The claim to the region has been suspended since the Antarctic Treaty came into force in 1961.

The territory was formed on 3 March 1962, although the UK's claim to this portion of the Antarctic dates back to letters patent of 1908 and 1917. The area now covered by the Territory includes three regions which, before 1962, were administered by the British as separate dependencies of the Falkland Islands: Graham Land, the South Orkney Islands, and the South Shetland Islands. The United Kingdom's claim to the region has been suspended since the Antarctic Treaty came into force in 1961, Article 4 of which states "No acts or activities taking place while the present Treaty is in force shall constitute a basis for asserting, supporting or denying a claim to territorial sovereignty in Antarctica. No new claim, or enlargement of an existing claim, to territorial sovereignty, shall be asserted while the present Treaty is in force." Most countries do not recognise territorial claims in Antarctica. The United Kingdom has ratified the Antarctic treaty.