Iceberg B-17B is an iceberg twice the size of Manhattan[1], floating in the southern ocean approximately 1,700 kilometres (1,100 mi) off the coast of Western Australia. Iceberg B-17B measures approximately 140 square kilometres (54 sq mi) and calved off the Ross Ice Shelf in 1999.[2]
The Australian Bureau of Meteorology issued a warning in mid-December 2009 to users of shipping lanes in the area.[1][3]