Yellow line: Northwest Passage. The International Ice Charting Working Group (IICWG), meeting at ESRIN in Frascati, issued the following statement on October 26, 2007: “In September 2007, the Arctic sea ice reached the minimum extent in the history of ice charting based on satellite, aircraft and surface observations, continuing a recent trend of diminishing sea ice that began in the 1980’s and has accelerated. While there will still be natural inter-annual variability, the decline is likely to continue. “The Arctic is already experiencing an increase in shipping, primarily for oil and gas development and tourism, and we can expect to see further increases as diminishing ice extent makes Arctic marine transportation more viable.