RAF Mount Pleasant has its own port facility called Mare Harbour, operated by Naval Party 2010 (NP2010). The Royal Navy has a formal commitment, through Atlantic Patrol Tasking (South), to maintain a potential presence in the area with a frigate or guided missile destroyer accompanied by an RFA vessel in the South Atlantic. However, as of 2019, was the last frigate to deploy on this tasking in 2015 and, in practice, an offshore patrol vessel, currently HMS "Forth", is the principal presence permanently close to the islands. In addition, an Ice Patrol Ship, , is on station close to Antarctica for six months of the year.