Built in Hartlepool, the Polruan was used as a collier until October 25 1916 when she foundered after striking Whitby Rock. A Board of Trade inquiry decided that whilst this was probably the case, they would discount that it may have struck a mine, this wreck like the wreck of the Rohilla is one which is owned by local divers. Average depth for this wreck is between 27 - 30 metres. This is a slack water dive and although well broken there is still quite a lot of wreckage to be seen over a large area, not a dive for novices, but good for those seeking some depth with lots of wreckage. Lying just to the east of Whitby Bell Buoy this wreck is only a short distance from the Harbour eliminating lengthy boat journeys.