إرنست شاكلتون
Launched in July 1995 as MV "Polar Queen" for GC Rieber Shipping, she was operated in the Antarctic by other national programmes. The British Antarctic Survey acquired her on a long-term bareboat charter in August 1999 to replace . She was renamed RRS "Ernest Shackleton" in 2000, after the Anglo-Irish polar explorer Sir Ernest Shackleton but was known to users as The Shack. After 20 years of polar duties for BAS, "Ernest Shackleton" was returned to her owners on 30 April 2019.