text: The Explorer was abandoned in the early hours of November 23 , 2007 after taking on water near the South Shetland Islands in the Southern Ocean , an area which is usually stormy but was calm at the time .
simplified: Everyone escaped from Explorer in the early hours of November 23 2007 after taking on water near the South Shetland Islands in the Southern Ocean , which is usually stormy , but was calm at the time .