A huge indoor rowing tank has been built at a Cambridge University college that could give rowers the winning edge.<br /><br />Known simply as the Cambridge Rowing Tank, the massive contraption consists of two 50ft pools for eight rowers’ oars, each containing 10 tonnes of water - or roughly 50 average baths. <br /><br />Sitting in Downing College’s boat club on the banks of the River Cam in Cambridge, it took six months to construct at a total project cost of nearly £700,000.