Page 232 - Manual for Activities directed at the Underwater Cultural Heritage

© Parks Canada. Observation grid, Red Bay, Canada.
Underwater research in the harbour led to the discovery of 3 Basque galleons and sev- eral small boats, superbly preserved examples of 16th century shipbuilding.
The documentation techniques applied in Red bay where exemplary and allowed the construction of a replica of one of the wrecks as well as the elaboration of a 5 volume repor t.
© Parks Canada. Bathymetric map of the site 24M, Red Bay, Canada.
Bathymetric survey is one of the marine geophysical techniques most widely
applied to marine archaeology. This technique, primarily developed for military and commercial purposes, is now being used in reconnaissance and site-specific underwater archaeological surveys.
The results of this type of grid survey
can be contoured and presented as 2-dimensional plots and surfaces, i.e. the results of a bathymetric survey can be contoured to provide a bathymetric chart of the topography of a seafloor and a Basque 16th century whaling vessel, using contour lines to indicate depth.
© Wessex Archaeology. Archaeological recording on-board a support vessel.
The team is tracking a diver who is surveying a wreck on the seabed. The diver’s helmet is also sending live video footage to the support team so they can see what he is looking at.
© INAH / SAS. Archaeologists from INAH’s Vice-Directorate of Underwater Archaeology of Mexico recording a part of a shipwreck, near the coast of Ciudad del Carmen, Campeche, Mexico.
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