Records of Humber Conservancy and the Humber Ports (Records deposited by Associated British Ports and its Predecessors) > Humber Conservancy > Humber Conservancy Board: Technical drawings of Buoys, Launches, Lightvessels and other ships submitted to the Board by Manufactures and related papers > Spurn Lightship HCB LV 12 > Drawing No. 9 L.V. 'Spurn' No. 275: Longitudinal W. T. Bulkheads