The awe-inspiring aerial photos of the 11-mile long and five-mile-wide iceberg. A National Geographic Explorer says an iceberg the size of Bristol floating in waters off the Antarctic coast signals a "warming disaster". American explorer, Adam Cropp, 34, has captured awe-inspiring aerial photos of the 11-mile long and five-mile-wide iceberg that has broken off a glacier. He says the moment he first saw the iceberg was one of the "most amazing experiences" of his life. The iceberg was first spotted by Royal Navy Antarctic patrol ship - the HMS Protector - during her final scientific mission to the Southern Hemisphere. The ship, based in Plymouth, Devon, was heading for Deception Island during her survey of the South Shetland Islands. These new photos, taken by US explorer, Adam, were taken in January as the National Geographic team were on their way to the Antarctic Peninsula. Adam, expedition leader for National Geographic Expeditions, says seeing icebergs of this size are becoming "all to common".