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Results of research 2009 - 2010
In the fieldwork carried out at the wreck in 2009 - 2010, part of the structure of the wreck was raised for dating research and for research into the condition of the timber, samples were taken to identify the timber species, the structure of the wreck and its internal areas were documented and photographs were taken for monitoring. In 2009 the organisms on the sea bed close to the wreck were also surveyed in order to determine the necessity of a Natura impact assessment. Questions concerning any paintings which may be on the wreck, the origin of the cargo and archive sources relating to the wreck have also been explored.
On the basis of the identification of the timber species in 2010, the construction material used in the hull of the ship was oak, while the rig was pine. The dendochronological dating of the deck planking sample will be completed during 2011. On the basis of the chemical analysis of the timber samples, sulphur and iron compounds have accumulated on the outer surface layer of the timber as a result of natural biochemical processes. The timber material studied is in an extremely good condition overall, judging from moisture content and density determinations.
Changes in the condition of the wreck can be identified by means of regular photographic monitoring. Photographic monitoring can be carried out by video or using a still camera. In the photographic monitoring carried out in 2010, changes were noted in the loose material on the starboard side of the wreck. For example, a fairly large structural timber part had moved from its original location probably during previous research dives at the wreck. No changes were observed in the cargo hold compared with previous reference material.
In addition, the structure of the wreck was documented in more detail by taking measurements and using video. For example, iron bolts with plates had been used as fastenings for the hull. The planks in the side are 40 cm wide in places. More detailed information on the type of vessel that the Vrouw Maria was will be provided in the Maritime Museum of Finland's exhibition publication in 2012.
The multibeam sonar carried out by Meritaito Oy in summer 2010 also surveyed the immediate environment of the wreck in more detail and three-dimensional pictorial material was produced on the basis of depth data for the area.
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Last updated 30.10.2015
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