The Pitcairn Islands are a British Overseas Territory in the South Pacific, home to fewer than 50 permanent residents on Pitcairn Island, the only inhabited island. There is no airport, and access is exclusively by sea, with supply ships visiting only a few times per year; landing can be hazardous due to sea conditions. There is no resident doctor, only a nurse; any serious medical emergency requires evacuation by ship or helicopter from a passing vessel, which can take days to arrange. Communication infrastructure is limited but includes satellite internet. Travellers must obtain permission to visit and should be entirely self-sufficient in terms of medication and essential supplies.