Underwater tooling Finland

Underwater tooling Finland


A photogrammetric 3D rough copy of the Joskär 1 wreck was made in the course of the maritime archaeological fieldwork courses at Hangö Summer University, Finland. The wreck has been explored for years in connection with the courses, during which the participants have had the opportunity to conduct real underwater excavation work in a real environment. The wreck has been measured, drawn and photographed, and various objects have been found at the wreck. Even though the wreck has been explored a great deal, as the excavations proceed, new information about shipbuilding and technology at the end of the 17th century is gained.


During the exploration of the wreck, an unknown wreck was found at the outer skerry of Raseborg, Finland. Diving was conducted at the location, and the locality was videotaped. On the basis of the video, a noninvasive search was conducted on the wreck in cooperation with Finland’s National Board of Antiquities and dive club H20. During the search, measurements of the vessel were documented, and remaining movables and a report were submitted to the National Board of Antiquities.


At the request of the National Board of Antiquities, side-scan sonar surveys were performed between Porvoo and Kotka to specify localization. The list of objectives of the National Board of Antiquities included 5 wrecks, of which 3 were wreck localities. Even though their geographic information was based on old, indicative coordinates, it was possible to perform a side-scan sonar survey in the area with the localizing equipment currently in use. A sonar scan survey was conducted in the areas, and reports on the locations of the localities were submitted to the National Board of Antiquities.