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Optimising protocols for high-definition imaging of historic shipwrecks using multibeam echosounder

  • Kieran WestleyEmail author
  • Ruth Plets
  • Rory Quinn
  • Chris McGonigle
  • Fabio Sacchetti
  • Mekayla Dale
  • Rory McNeary
  • Annika Clements
Original Paper

Abstract

Conservation of historic shipwrecks is prohibitively expensive and in situ preservation and recording are the preferred archaeological approaches. Non-destructive high-definition 3D imaging is therefore essential for recording and managing submerged historic shipwrecks. Multibeam echosounders (MBES), the standard tool for hydrographic survey, can produce point clouds to image complex 3D structures. However, wreck imaging is often done using MBES in traditional survey mode optimised for morphological characterisation of the seafloor. This does not necessarily provide high-definition imagery required by archaeologists. This study demonstrates key factors influencing high-definition MBES imaging of wrecks through a controlled field experiment. Results show that optimal high-definition 3D imaging is achieved through maximising the pulse rate, narrowing the angular sector, using the highest frequency and shortest pulse lengths, applied to at least 3 to 5 overlapping centreline-parallel and offset passes with additional perpendicular/oblique lines. Variations in survey design are demonstrated to exert strong controls on sounding density and distribution, with high-density on horizontal and vertical wreck surfaces enabled by a combination of overlapping passes and offset lines. Adoption of this method would result in more widespread high-definition 3D imaging of wrecks to benefit archaeological research and develop effective mitigation strategies to minimise loss of the fragile underwater resource.

Keywords

Multibeam echosounder Shipwreck Marine geoarchaeology Point cloud High-definition imaging Best practice 

Notes

Acknowledgements

This work was supported by the Marine Institute of Ireland’s ship-time programme (APP-CV15009: World War I shipwrecks in the Irish Sea: commemoration, visualization and heritage management). We thank the crew of the Celtic Voyager; without your patience and enthusiasm, we could not have achieved this. Thanks to Bob Kinnear (Maritime and Coastguard Agency) for provision of SS Neotsfield data and Karl Brady (Dept. of Culture, Heritage and the Gaeltacht) for supporting work in the Republic of Ireland waters. Finally, we are indebted to the late Martin Dean. His support and guidance were essential in bringing this project to fruition.

References

  1. Adams J (2001) Ships and boats as archaeological source material. World Archaeol 32:292–310CrossRefGoogle Scholar
  2. Astley A, Dix JK, Thompson C, Sturt F (2014) A seventeen year, near-annual, bathymetric time-series of a marine structure (SS Richard Montgomery). In: Cheng L, Draper S, An H (eds) Scour and erosion: proceedings of the 7th international conference on scour and erosion. Taylor & Francis, London, pp 715–724CrossRefGoogle Scholar
  3. Ballard R, Archbold R (1987) The discovery of the titanic. Hodder & Stoughton, LondonGoogle Scholar
  4. Bates CR, Dean M, Lawrence M, Robertson P, Tempera F, Laird S (2007) Innovative approaches to Rapid Archaeological Site Surveying and Evaluation (RASSE). Report prepared for English Heritage. University of St. Andrews, St AndrewsGoogle Scholar
  5. Bates CR, Dean M, Lawrence M, Robertson P (2011) Geophysical methods for wreck-site monitoring: the Rapid Archaeological Site Surveying and Evaluation (RASSE) programme. Int J Naut Archaeol 40:404–416CrossRefGoogle Scholar
  6. Bellec V, Bøe R, Rise L, Lepland A, Thorsnes T, Bjarnadóttir L (2017) Seabed sediments (grain size) of Nordland VI, offshore north Norway. J Maps 13:608–620CrossRefGoogle Scholar
  7. Brady K, McKeown C, Lyttleton J, Lawler I (2012) Warships, U-boats & liners. A guide to shipwrecks in Irish waters. The Stationary Office, DublinGoogle Scholar
  8. Calder B, Forbes D, Mallace D (2007) Marine heritage monitoring with high-resolution survey tools: Scapa flow 2001-2006. Proceedings of U.S. Hydro Conference May 2007Google Scholar
  9. Calvert J, Strong J, Service M, McGonigle C, Quinn R (2015) An evaluation of supervised and unsupervised classification techniques for marine benthic habitat mapping using multibeam echosounder data. ICES J Mar Sci 72:1498–1513CrossRefGoogle Scholar
  10. CloudCompare (version 2.8.1) [GPL software] (2017) Retrieved from http://www.cloudcompare.org
  11. Dean M, Lawrence M, Rowland C (2007) Visualizing high-resolution multibeam shipwreck data. Proceedings of U.S. Hydro Conference May 2007Google Scholar
  12. Eriksson N, Rönnby J (2012) ‘The ghost ship’. An intact Fluyt from c. 1650 in the middle of the Baltic Sea. Int J Naut Archaeol 41:350–361CrossRefGoogle Scholar
  13. Fernandez-Montblanc T, Quinn R, Izquierdo A, Bethencourt M (2016) Evolution of a shallow water wave-dominated shipwreck site: Fougueux (1805), Gulf of Cadiz. Geoarchaeology 31:487–505CrossRefGoogle Scholar
  14. Flatman J (2003) Cultural biographies, cognitive landscapes and dirty old bits of boat: ‘theory’ in maritime archaeology. Int J Naut Archaeol 32:143–157Google Scholar
  15. Gibbins D, Adams J (2001) Shipwrecks and maritime archaeology. World Archaeol 32:279–291CrossRefGoogle Scholar
  16. Hughes Clarke JE (2017) Multibeam echosounders. In: Micallef A, Krastel S, Savini A (eds) Submarine geomorphology. Springer, pp 25–42Google Scholar
  17. Hughes Clarke JE, Lamplugh M, Czotter K (2006) Multibeam water column imaging: improved wreck least-depth determination. Proceedings of the Canadian Hydrographic Conference May 2006Google Scholar
  18. IHO (2008) IHO standards for hydrographic surveys—standards and specifications publication S-44 (5th Edn). International Hydrographic Bureau. https://www.iho.int/iho_pubs/standard/S-44_5E.pdf. Accessed April 2018
  19. IHO (2011) Manual on hydrography—capacity building publication C-13 (1st edn). International Hydrographic Bureau. https://www.iho.int/iho_pubs/CB/C13_Index.htm. Accessed April 2018
  20. Kongsberg (2013). EM technical note. Detector modes is SIS for EM2040, EM2040C and EM3002. https://www.km.kongsberg.com/ks/web/nokbg0397.nsf/AllWeb/45B1BC0CF3EE4D06C1257C7E002DA3FA/$file/Kongsberg-EM-Technical-Note-EM-Detector-Modes-in-SIS.pdf?OpenElement. Accessed August 2017
  21. Kongsberg (2016). EM2040 Multibeam Echosounder Specifications. https://www.km.kongsberg.com/ks/web/nokbg0240.nsf/AllWeb/C75143F8AA145B48C12575E500276CA4?OpenDocument. Accessed August 2017
  22. Lecours V, Dolan M, Micaleff A, Lucieer V (2016) A review of marine geomorphometry, the quantitative study of the seafloor. Hydrol Earth Syst Sci 20:3207–3244CrossRefGoogle Scholar
  23. Lurton X (2010) An introduction to underwater acoustics. Principles and applications. Springer, HeidelbergCrossRefGoogle Scholar
  24. Maarleveld T, Guérin U, Egger B (2013) Manual for activities directed at underwater cultural heritage. Guidelines to the Annex of the UNESCO 2001 Convention. UNESCOGoogle Scholar
  25. Manders M (2009) Multibeam recording as a way to monitor shipwreck sites. In: MACHU final report NR. 3—managing cultural heritage underwater, pp 59–66Google Scholar
  26. Mayer L (2006) Frontiers in seafloor mapping and visualization. Mar Geophys Res 27:7–17CrossRefGoogle Scholar
  27. MCA (2013) UK Civil Hydrography Programme. Survey specification. http://www.channelcoast.org/ccoresources/specificationsandbriefs/. Accessed August 2017
  28. McCartney I (2016) Jutland 1916: the archaeology of a naval battlefield. Bloomsbury, LondonGoogle Scholar
  29. Mertes J, Zant C, Gulley J, Thomsen T (2017) Rapid, quantitative assessment of submerged cultural resource degradation using repeat video surveys and structure from motion. J Marit Archaeol 12:109–107CrossRefGoogle Scholar
  30. Ødegård Ø, Hansen R, Singh H, Maarleveld T (2018) Archaeological use of synthetic aperture sonar on deepwater wreck sites in Skagerrak. J Archaeol Sci 89:1–13CrossRefGoogle Scholar
  31. Plets R, Quinn R, Forsythe W, Westley K, Bell T, Benetti S, McGrath F, Robinson R (2011) Using multibeam echo-sounder data to identify shipwreck sites: archaeological assessment of the Joint Irish Bathymetric Survey data. Int J Naut Archaeol 40:87–98CrossRefGoogle Scholar
  32. Plets R, Clements A, Quinn R, Strong J (2012) Marine substratum map of the Causeway Coast, Northern Ireland. J Maps 8:1–13CrossRefGoogle Scholar
  33. Plets R, Dix J, Bates CR (2013) Marine geophysics data acquisition, processing and interpretation. Guidance notes. English Heritage, LondonGoogle Scholar
  34. Quinn R, Boland D (2010) The role of time-lapse bathymetric surveys in assessing morphological change at shipwreck sites. J Archaeol Sci 37:2938–2946CrossRefGoogle Scholar
  35. Quinn R, Dean M, Lawrence M, Liscoe S, Boland D (2005) Backscatter responses and resolution considerations in archaeological side-scan sonar surveys: a control experiment. J Archaeol Sci 32:1252–1264CrossRefGoogle Scholar
  36. Sacchetti F, Benetti S, Georgiopoulou A, Dunlop P, Quinn R (2012) Geomorphology of the Irish Rockall Trough, North Atlantic Ocean, mapped from multibeam bathymetric and backscatter data. J Maps 7:60–81CrossRefGoogle Scholar
  37. Strong J, Service M, Plets R, Clements A, Quinn R (2012) Marine substratum and biotope maps of the Maidens/Klondyke bedrock outcrops, Northern Ireland. J Maps 8:129–135CrossRefGoogle Scholar
  38. UNESCO (2001) Convention on the Protection of the Underwater Cultural Heritage. http://www.unesco.org/new/en/culture/themes/underwater-cultural-heritage/2001-convention/official-text/. Accessed August 2017
  39. USACE (2013) Hydrographic surveying engineer manual (EM 1110-2-1003). US Army Corp of Engineers. http://www.publications.usace.army.mil/USACE-Publications/Engineer-Manuals/?udt_43544_param_page=4. Accessed April 2018

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Geography & Environmental SciencesUlster UniversityColeraineUK
  2. 2.Marine InstituteCo. GalwayRepublic of Ireland
  3. 3.Historic Environment Division, Department for CommunitiesCauseway ExchangeBelfastUK
  4. 4.Agri-Food and Biosciences InstituteFisheries and Aquatic Ecosystems BranchBelfastUK

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