Tourism companies are required by the Antarctic Treaty to have a permit to visit Antarctica. Because no country owns Antarctica, countries which have signed the Antarctic Treaty issue permits, rather than visas. For example, an Australian traveling to Antarctica with a tourist company would need to show compliance with the Antarctic Treaty (Environment Protection) Act 1980 by means of an Environmental Impact Assessment (EIA) approved by the Australian Antarctic Division (AAD) of the Department of Agriculture, Water, and the Environment. Many sea cruises by cruise ships include a landing by RIB (Zodiac) or helicopter. Some land visits may include mountaineering, skiing or even a visit to the South Pole.