It has a 1,300-metre (4,300 ft)-long airstrip (Teniente Rodolfo Marsh Martin Aerodrome, ICAO Code SCRM),[3] with 50 intercontinental and 150 intracontinental flights each season, serving as a means of transport to many nearby bases.

It also includes the Villa Las Estrellas residential area that has a hospital, a school, a bank, a small supermarket, etc.

When the installations were expanded, it was renamed as Base Teniente Rodolfo Marsh, with the meteorology center keeping its original name.

[5] Like the coastal areas of Antarctic Peninsula and the subantarctic islands south of the 60º parallel, the area has a tundra climate, that could be considerably borderline "maritime-influenced polar climate", thanks to temperatures that rarely drop below −15 °C (5 °F) in winter (which is commonplace in most of Antarctica), and temperatures that could soar a few digits above freezing for most parts of the year.

The base's area and its vicinity (the entire island, actually) experiences a rather heavy precipitation, with an average precipitation rate of 405 millimetres (15.9 in) yearly,[6] which makes it unusual on the Antarctic continent, as the continent is significantly drier than the islands are to the north.