Site Charting and Environmental Studies of the Monitor Wreck

Abstract

Marine geological and geophysical techniques have been applied to studies of the Monitor wreck to chart the fragments of the wreck and to determine the corrosion state of the remaining iron and the state of the geological and oceanographic environment in the immediate area of the wreck. Methods included magnetic surveying of the wreck site, computer calculations of the magnetization of the Monitor iron, and comparisons with magnetic measurements on iron artifacts from the wreck. Piston coring of the strata immediately beneath the wreck and near-bottom current measurements revealed evidence on the sedimentation rates and sediment transport at the site; these data confirmed interpretations made from high-resolution subbottom reflection profiles across the site.     

The Western River Steamboat Heroine, 1832–1838, Oklahoma,USA: excavations,summary of finds,and history

This paper describes the excavation, discoveries relating to the hull, machinery, and artefacts, and the history of an early steamboat wreck discovered in the Red River between Oklahoma and Texas. The wreck has been identified as the side‐wheel steamer Heroine, a vessel in service on the Mississippi, Ohio, and other western rivers of North America during the 1830s. It is the earliest example of this famous type of vessel yet studied.     

A Cross-Staff from the Wreck of HMS Stirling Castle (1703), Goodwin Sands, UK, and the Link with the Last Voyage of Sir Cloudesley Shovell in 1707

Several pieces of cross-staffs have been found on the wreck of the Stirling Castle on the Goodwin Sands. One has been assembled from parts of staffs found when the wreck was first investigated, and is currently in the National Maritime Museum, Greenwich. Another part of a staff was found in 2001. It is from a cross-staff rather than a back-staff and, except for broken ends, is in good condition. The problems encountered in using such instruments are linked with the loss of Sir Cloudesley Shovell's fleet in 1707.
© 2009 The Author     

The Natural Environment of the Shipwreck Vrouw Maria (1771) in the Northern Baltic Sea: an assessment of her state of preservation

Vrouw Maria, a merchant vessel sailing from Amsterdam to St Petersburg in 1771, ran aground in the northern Baltic Sea. Her cargo included Dutch works of art bought by Catherine the Great. The wreck was located in 1999, 41 m deep. This study aims to understand environmental factors and physical stresses affecting the wreck, using three different approaches—studying the wreck as an artificial reef; describing the conditions inside the wreck; and measuring the physical stresses caused by currents. The methods applied were biological, archaeological, hydrological, geological and physical. The data will be a basis for further monitoring. © 2010 The Authors     

Dartmouth Revisited

As Dartmouth has been the only wreck of a man-of-war from the 17th century to have been published in a preliminary report, it has long been the benchmark wreck for this period. Since the date of the publication, however, research has uncovered information that was not available at the time and which may shed additional light on this interesting ship. This paper aims to contribute to our understanding of Dartmouth 's construction and her place as a typical small cruiser of the mid-17th century.
© 2007 The Author     

A Spanish Man‐o‐War in New Zealand? The 1864 wreck of Grafton and its lessons for pre‐Cook shipwreck claims

This paper considers the 1864 wreck of Grafton in the Auckland Islands, and its implications for wreck analysis and pre‐Cook exploration claims. The captain of Grafton, Thomas Musgrave, stated that the schooner was built from the wreck of a Spanish man‐o‐war, and archaeological analysis of the wreck found that the timbers are a tropical South American species, and had possibly been reused. The implications of this are clear; it is possible that timbers that originated in pre‐Cook (1769) ships lie in New Zealand, but without a full understanding of the historical and archaeological context of any such timbers, including their reuse in later ships, it is not possible to claim proof of pre‐Cook European exploration of New Zealand.     

The ship Riksäpplet and the introduction of English naval architecture in Sweden in the 17th century

SUMMARY: The 84-gun ship Riksäpplet was one of the first ships in Sweden built under supervision of the newly recruited English master. In 1676, the ship came adrift, struck a rock and sank. In 2015 a minor field survey of the wreck was undertaken. An inventory of finds recovered from the wreck in various museum collections and in private hands has been compiled and the preserved correspondence from the construction of the ship has been re-examined. This material has provided new insights regarding the peculiarities and special architecture of Riksäpplet.     

Navigational Equipment from 't Vliegend Hart (1735)

The Dutch United East-India Company ship 't Vliegend Hart sank in the mouth of the River Scheldt in 1735. With archival sources the wreck was located in 1979, and in the following years researched and excavated, a process still continuing. This article gives a brief historical introduction on the ship, followed by a paragraph on the art of navigation and navigational instruments at the time of 't Vliegend Hart 's sailing. Thereafter this is compared with the navigational artefacts retrieved from the wreck. In the final paragraph the exploration of the 't Vliegend Hart wreck is briefly dealt with.
© 2006 The Authors     

Processes and patterns of flow,erosion, and deposition at shipwreck sites: a computational fluid dynamic simulation

Shipwreck sites are open systems, allowing the exchange of material and energy across system boundaries. Physical processes dominate site formation at fully submerged wreck sites, and in turn influence chemical and biological processes at many stages of site formation. Scouring presents a fundamental yet poorly understood threat to wreck sites, and the processes and patterns of erosion and deposition of sediments and artefacts at wreck sites are poorly understood. Laboratory and field-based experiments to study these phenomena are time-consuming and expensive. In this study, open-source computational fluid dynamic (CFD) simulations are used to model the processes and patterns of flow, erosion, and deposition at fully submerged wreck sites. Simulations successfully capture changes in the flow regime in the environment of the wreck as a function of incidence angle, including flow contraction, the generation of horseshoe vortices in front of the wreck, the formation of lee-wake vortices behind the structure, and increased turbulence and shear stress in the lee of the wreck site. CFD simulations demonstrate that horseshoe vortices control scour on the upstream face of structure but play a minimal role in scouring on the lee side. Lee-wake vortices dominate behind the structure, with low-pressure zones in the lee of the wreck capturing flow. The amplification and reduction of wall shear stress and turbulent kinetic energy in the lee of the vessel form distinctive patterns in relation to flow direction, with areas of amplified and reduced wall shear stress and turbulent kinetic energy demonstrating excellent spatial correlation with erosional and depositional patterns developed at real-world wreck sites.     

Archaeological Survey of the Ex-USS <Emphasis Type="Italic">Independence</Emphasis> (CVL22)

In August 2016, a multidisciplinary team conducted the first archaeological survey of the deep-water (829 m) wreck of the ex-USS Independence (CVL22) using the remotely operated vehicles Argus and Hercules. The survey provided 34 h of direct observation with video and still camera documentation of the wreck, which the previous year had been initially identified with a limited three-dimensional sonar survey of the site. The 2016 assessment added considerably to an understanding of changes to Independence after its use as a target vessel for the 1946 atomic bomb tests at Bikini Atoll, as a radiological laboratory, training facility, and finally as a receptacle for “nuclear waste” prior to its scuttling off California in January 1951. The location and detailed examination of the wreck, along with additional archival research, offers a more nuanced definition of the carrier’s role within the context of the Cold War between the USSR, its adversaries and the race to establish nuclear supremacy, as well as site formation processes and ongoing biological colonization of the wreck site. As well, no evidence of residual radiological contamination was noted during the mission.     

Mapping of the Buried Yarmouth Roads Wreck, Isle of Wight, UK, using a Chirp Sub-Bottom Profiler

Remains of the 16th-century Yarmouth Roads wreck, buried in sediments, were imaged using high-resolution geophysical techniques. The remains appear as strong reflectors underlain by an acoustic blanking zone, which was used to create maps of the wreck material. Close survey line-spacing allowed the construction of contour maps and hull sections, which revealed that the bow and stern sections are tilted to port at different angles, implying that they are detached. The seismic data have enhanced our understanding of the site beyond what was known from conventional archaeological investigations and confirms that this wreck was once a large carrack.
© 2007 The Authors     

The British Brig Water Nymph or ... even an Englishman cannot take the liberty to deride a civil servant on German soil

The wreck of a 19th-century merchantman was surveyed and partly excavated in the course of archaeological fieldwork conducted prior to planned beach restoration in Ahrenshoop on the Baltic coast in north-eastern Germany. Extensive archival research led to the identification of the wreck and provided interesting details on the life and loss of a typical merchant sailing-ship of the mid-19th century.
© 2007 The Authors     

HMS Falmouth: addressing the significance of a light cruiser lost in the First World War off the coast of Yorkshire

HMS Falmouth is the only known wreck of a Town Class light cruiser, which were ‘arguably the best cruisers of the First World War’ (Lyon, 1977c: 49). This article reports on a project to better understand the significance of the wreck and to raise public awareness of the heritage of the First World War at sea. Although the wreck is heavily degraded it is still of considerable importance, raising methodological questions about the role of multibeam survey and 3D visualization, access to archival material, and the characteristics of archaeology as applied to 20th‐century warships.     

Gyptis and the Archaic Greek Sewn‐boat Technique

The archaic Greco‐Massaliote wreck Jules‐Verne 9 is a fully sewn boat with all the elements (planking and frames) assembled by ligatures. The remains of some stitches found in place allowed the system of ligatures, which is particularly sophisticated, to be precisely reproduced. This assembly system made of sewing and lashings was used during the construction of Gyptis, the sailing replica of the Jules‐Verne 9 wreck. The experience permitted many questions to be answered about the assembly process, function, and maintenance of the boat.     

HMS Colossus,an Experimental Site Stabilization

Abstract

HMS Colossus, a 74-gun warship, sank in the Isles of Scilly in 1798. The stern half of this vessel became exposed on the seabed some time around 2001. The timbers of the wreck were in excellent condition when first exposed but quickly began to deteriorate, mainly due to attack by wood-boring organisms. In 2003 English Heritage commissioned a two-year stabilization trial project on the site. These trials were aimed at determining the most effective method of protecting the exposed timbers of the wreck. Three different methods of protection were trialled, all of which had been used previously elsewhere. One of these methods, a Terram 4000 mat, was clearly the most effective on this site. In 2008, a small area of the wreck was covered with a Terram 4000 mat to determine the long-term efficacy of this means of site stabilization. Prior to installation the area to be covered was recorded in detail, along with an adjacent area as a control, to facilitate future comparison of the condition of the ship's timbers. This work, too, was commissioned by English Heritage (Camidge 2008).     

Mars (1564): the initial archaeological investigations of a great 16th‐century Swedish warship

Before the Swedish warship Mars exploded and sank in action against a combined Danish and Lübeckian fleet in 1564, it was one of the largest ships in the world. In 2011 the wreck was relocated off the island of Öland in the Baltic Sea. Thanks to the favourable conditions in the brackish water, about two thirds of the hull is preserved on the sea bottom, including the stern with the large sterncastle. The aim of this article is to present initial archaeological observations and results of work since 2011. We briefly describe the historical context and research perspectives regarding this wreck.     

The 9th‐Century‐AD Belitung Wreck,Indonesia: analysis of a resin lump

The 9th‐century‐AD Belitung wreck was discovered in 1998 in the Java Sea. Construction techniques rapidly confirmed that it was unlike any known Chinese or Southeast Asian vessel. The uncertainty about its origins was resolved in 2008 by timber identifications: it was constructed in the Middle East (probably Oman or Yemen). This paper, on the characterization of a dammar resin lump collected in the vicinity of the wreck, supplies additional evidence confirming the probable re‐stitching of the vessel somewhere in Asia. © 2010 The Authors     

The Wreck of the <Emphasis Type="Italic">Pettu</Emphasis> as an Example for Nineteenth Century Rural Shipbuilding in South-Western Finland

Although the design and construction of wooden merchant vessels in the nineteenth century is generally considered to be well understood, the excavation and subsequent analysis of the wreck of the wooden Finnish topsail schooner Pettu (1865) revealed a number of unexpected features, which prompted the authors to take a closer look at the ship. In the following study, it will be attempted to gain an insight into the society that produced and used the merchant vessel through a detailed analysis of its construction and an investigation into the concept behind its design. The wreck of the Pettu, which, considering its loss in 1893, is barely covered by the 100 year rule in Danish heritage legislation, is a good example for the archaeological potential of even relatively ‘modern’ wreck sites, adding to their significance.     

The role of scour in shipwreck site formation processes and the preservation of wreck-associated scour signatures in the sedimentary record – evidence from seabed and sub-surface data

Fully submerged shipwreck sites act as open systems, with the exchange of material (sediment, water, organic and inorganic objects) and energy (wave, tidal, storm) across system boundaries. Formation processes at wreck sites are driven by some combination of chemical, biological and physical processes, with physical processes dominant in initial phases of site formation. Scouring and associated depositional patterns that form in response to hydrodynamic forcing are commonly the dominant physical processes acting at shipwreck sites. Scour is initiated by the introduction of a shipwreck to the seafloor, leading to increases in flow velocity and turbulent intensity around the structure. Near-field and far-field scour pits form at wreck sites due to the interaction of horseshoe and lee wake vortices with the mobile substrate. The morphology of resultant scour signatures are controlled by the orientation of the wreck structure in relation to the prevailing hydrodynamic regime, the morphology and size of the wreck and individual site components, the hydrodynamic regime (currents, waves or combined waves and currents), bathymetry and the geology of the site (seafloor and sub-surface conditions). Individual objects or artefacts may act as nuclei to promote scour at a local scale. Under high-energy conditions, groups of artefacts and/or disarticulated structural components emanating from a wreck may compound natural scour processes by rolling or sliding. Under suitable environmental conditions, wreck-associated scour features can be preserved in the sedimentary record.