Simplify the following text for a Grade 11 native English-speaking person.
Original: After visiting the Falkland Islands and South Georgia Island the Explorer hit an unidentified submerged object in the Bransfield Strait close to King George Island in the Antarctic Ocean , near the South Shetland Islands , on November 23 , 2007 .
Simplified: After visiting the Falkland Islands and South Georgia she hit an iceberg in the Bransfield Strait close to King George Island in the Southern Ocean , near the South Shetland Islands , on November 23 , 2007 .