(FORTUNE Magazine) – WE STARTED TO HARVEST ICE FOR PRODUCTS like bottled water and vodka about seven years ago. We thought it was a bit of a joke at first, but it grew into a big business. We can hunt from March through September. Icebergs are graded from a bergy bit to a castle. A bergy bit is the size of a Volkswagen, and a castle is a million tons or more, like the one that sank the Titanic. We have a license to harvest 72,000 tons a year, which is a lot of ice. What limits you is nature itself. You've got to hunt for the icebergs and then wait for nature to break them up. The sun has a nice bit to do with it. Sometimes we can steam around, and the movement of the waves will make it fall apart, or we put the stereo on full blast and play rock music. We also use a rifle. People think we blow the icebergs up, but we don't. It's the noise that does it. A smaller boat is used to pick up the bits. The wranglers throw a net over the ice and a crane pulls it up into the boat. It is very dangerous work. They rumble and fall apart and create little tsunamis that can tip a boat over. It's like cow wrangling--every cow is different, and every iceberg is different.