:Heard Island and McDonald Islands Geography Total area: 412 km2 Land area: 412 km2 Comparative area: slightly less than 2.5 times the size of Washington, DC Land boundaries: none Coastline: 101.9 km Maritime claims: Exclusive fishing zone: 200 nm Territorial sea: 3 nm Disputes: none Climate: antarctic Terrain: Heard Island - bleak and mountainous, with an extinct volcano; McDonald Islands - small and rocky Land use: arable land 0%; permanent crops 0%; meadows and pastures 0%; forest and woodland 0%; other 100% Environment: primarily used as research stations Note: located 4,100 km southwest of Australia in the southern Indian Ocean :Heard Island and McDonald Islands People Population: uninhabited :Heard Island and McDonald Islands Government Long-form name: Territory of Heard Island and McDonald Islands Type: territory of Australia administered by the Antarctic Division of the Department of Science in Canberra (Australia) Capital: none; administered from Canberra, Australia :Heard Island and McDonald Islands Economy Overview: no economic activity :Heard Island and McDonald Islands Communications Ports: none; offshore anchorage only :Heard Island and McDonald Islands Defense Forces Note: defense is the responsibility of Australia