In today's episode, Ben jumps aboard one of the most important boats in Poole Harbour - the dredger. It maybe dirty work but without the crucial work done by the dredger and her skipper Dean Cluett, water levels would become too shallow bringing the the harbour to a standstill as boats and ships would run aground. Having got stuck in helping out with this all-important job, Ben is then taken by Dean on a surprise visit to see a ‘super' dredger - the Amazone. This hugely impressive ship only works the harbour once every three years and can dredge the same amount of silt and sand in one hour as Dean's dredger does in nine days!