When approaching Antarctica it is a good idea to have an ice pilot aboard. These bergs look benign. The part we see is as big as a house. 90% more of these bergs is below the water surface.
Winter increases the ice by 40,000 square miles per day, and eventually doubles the size of Antarctica. That's one and a half USA's, two Australia's or 50 UK's worth of ice area that forms, then breaks up and melts each year.
90 percent of all the world's ice and it is 70 percent of all the world's fresh water resides in Antarctica.