Plate 13.9 Multibeam image of a nineteenth-century wooden sailing ship on the Goodwin Sands at the entrance to
the Strait of Dover. The end of the bowsprit now rests on the sea-bed but when surveyed 12 weeks earlier, it was in
its operational position. (Courtesy of ADUS and the RASSE Project, University of St Andrews)Plate 13.10 Ground-discrimination data collected from a single-beam echo-sounder showing (a) bathymetry,
(b) hardness and (c) roughness of the wreck of the 178 m (580 ft) long Markgraff(1919) in Scapa Flow. (Courtesy of
Mark Lawrence, ADUS, University of St Andrews)9781405175913_7_Plates 5/7/08 6:27 PM Page 13