Computer manufacturer Dell has shaken the air cargo industry with the news that it aims to be using ocean transport to ship 70 per cent of its consumer notebook products by 2013 at the expense of air cargo. By the end of this year, Dell said, it will have shipped 3 million notebooks by sea, which represents around 20 per cent of its output. Last year, it used ocean services to transport just 5 per cent of its consumer volumes.