Page 32 - TVH 2000 Anniversary Shipwreck Project

The build drawings of the hull of the Vliegent Hart were digitised and added to the site plan. This allowed the chart to be used for planning ‘what if ‘scenarios and for testing ideas about site formation. The plans of Terschelling were also digitised and added to the chart in its true position, this provided a handy scale and frame of reference to help the divers understand the layout and orientation of the site. Both of the hull drawings were used when the ship was moved and positioned over the brick cargo towards midships. The co-ordinates of the chart were real world UTM grid-co-ordinates so that they could be plotted on the Pharos APS chart and used to position the ship. The appropriate portion of Terschelling could then be placed anywhere on the projected hull of the Vliegent Hart. The main sea chart was digitised to get a wide area picture showing other wrecks on the area and the sandbank which the vessel hit. Structural Interpretation The CAD system was used to project different angles of heel and erosion lines, these could be altered when measurements taken underwater were obtained. There was not enough information to generate a 3D model of the hull but sections were available as scanned images, these were imported and scaled to true size as accurately as possible. For example elevations could be rotated to the desired angle then measurements taken off them and compared with real measurements. . - 30 -