The Bernal Islands are a group of four mainly snow-covered islands and a number of rocks lying in Crystal Sound, about 10 nautical miles (20 km) east of the south end of Lavoisier Island, Biscoe Islands. They were mapped from surveys by the Falkland Islands Dependencies Survey (1958–59) and from air photos obtained by the Ronne Antarctic Research Expedition (1947–48), and named by the UK Antarctic Place-Names Committee for John D.