Records of Humber Conservancy and the Humber Ports (Records deposited by Associated British Ports and its Predecessors) > Humber Conservancy > Humber Charts: Surveys conducted by the Humber Conservancy Board (including cross sections and sounding sheets) > Humber Conservancy Board: Middle Humber (South Channel, Hull Roads) Annual Surveys > Humber Conservancy Board: [South Channel Examination] Survey between New Holland Float and No. 10 Elbow Buoy