This is the primarily application of the AQUA-
The easy to set up and use, as well as the fully autonomous configuration, make AQUA-
Application to Archaeology:
Following measurements have been taken on the XVIIIth century wreck named " Epave aux Ardoises " (slate wreck), located west of France near the Gulf of Morbihan (Brittany). This was a relatively small ship (about 15 meters long) carrying a large amount of slates that led it to sink rapidly in a flat attitude and shallow water (10 meters).
The measurements were concentrated on the front half part of the ship, which had been made free of any slate. The main goal was to measure the 3D shape of the wooden frame.
Only one diver was necessary to operate the system during this operation, about two hundred point were measured along two successive dives of 45 and 30 minutes respectively (including system set up). Back to the surface, the points were transferred from the pointer to a PC computer, the measurement were processed using a CAD software (dxf file exchange format) in order to built the 3D shapes and volumes from the measured points.
3D view of the wooden frame
This measurement campaign using AQUA-
The total underwater measurement lasted only 75 minutes, replacing the ordinary underwater long (and wet!) drawing task by a simple (dry and hot...) CAD software utilization.
The measurement also provided the pitch and roll of the wreck, thanks to the horizontal gravity referenced measurement scheme of the system.