HUMA Maritime archaeology Gotland
Results of the field period in 2009
The excavations continued largely along the same lines as in 2008, but on a smaller scale. Three weeks were devoted to the excavation of the sites off Kopparsvik, Brusviken and Krusmyntagården. 15 divers made 52 dives, clocking up a diving time of 122 hours and 39 minutes.
About 186 800 square metres of the extensive find areas were surveyed. A total of 35 reference lines were scanned on both sides, each reference line was 150 metres long and they were placed at 25 metre intervals. The reason why the scanned area was so much larger this year, was that the intervals between the reference lines was increased from 3-4 to 25 metres. The reason for this was to make a rough survey and to find the outer delimitations of the find areas. A further nine reconnaissance dives were made either along the underwater ledges, along the coastline or as a circular search. Along the long reference lines alone, the divers covered an area of 10.5 kilometres.
The areas excavated this year were situated at a depth of 3.8-11 metres. Since some of them were further offshore compared to last year, the diving leader and security diver transported the divers out to sea in a rubber dinghy. Visibility in the water varied from 0-10 metres, and the temperature varied between 4o and 19oC
|Number of dives||52|
|Number of divers||15|
|Number of diving days||20|
|Total Scanned area||186 800 m2|
|Total diving time||122 h 39 min|
|Time spent at Krusmynta||95 h 51 min|
|Time spent at Brusviken||19 h 4 min|
|Time spent at Kopparsvik||7 h 44 min|
With this season’s diving activities within the HUMA project the following objectives were met:
- Establishing the limits of the wreckage area at Krusmyntagården.
- Taking samples for Dendro chronological analysis from the large wooden aft piece at Brusviken.
- Documentation of the cannon at Brusviken by drawings and taking measurements.
- The wreckage area at Kopparsvik was demonstrated to continue southward and connecting to the area around the water inlet of the GEAB establishment.
39 finds were recovered which is only a fraction of all the objects that were located, but the majority of the indications that were uncovered and discarded were cannon balls in different states of corrosion, uninteresting to science and excessively expensive to preserve. The raised finds were comprised of precious metals, some lead objects and pottery and tiles. Block bearings, a complete tile from the galley, large bronze hoops, lead sounds, thin sheet copper and unidentified projectiles were some of the objects, along with a shoe horn-like item embedded in an iron crust together with a cannon ball.
Moreover, some coins were salvaged; some large silver coins with the Lubeck eagle and some smaller “change” from Denmark of both copper and silver. By Kopparsvik the recovered objects beside a bronze pestle consisted of two well preserved lead bullets with the excess lead from molding clearly trimmed by pliers or the like.
The voluntary ground staff were involved in the documentation of the finds as registering their features in the data base while at the same time they kept in touch with the dive supervisor in the boat and kept track of the time the divers spent underwater.