Simplify the following text for a Grade 12 native English-speaking person.
Original: In the summer of 1985 , when the British non-governmental exploratory vessel Southern Quest sank in the Ross Sea , United States Coast Guard helicopters rescued the crew , who were taken to McMurdo Station .
Simplified: In the late 1980s , the British non-governmental exploratory vessel Southern Quest sank in the Ross Sea , United States Coast Guard helicopters rescued the crew , who were taken to McMurdo Station .