The scientific bases of Scott Base (New Zealand), McMurdo Station (US) Mario Zucchelli Station (Italy) and Jang Bogo station (South Korea) are the only permanently occupied human habitations in the area, though Amundsen–Scott South Pole Station (US) is partially within the territory and dependent on logistics operations based in New Zealand. China is establishing a year-round research station at Inexpressible Island in Terra Nova Bay of the Ross Sea that is expected to open in 2022. The Dependency has access to a U.S. Antarctic Program maintained snow runway at Williams Field, and depending on conditions and time of year, two ice runways. This guarantees accessibility by wheeled and ski equipped aircraft year round.