The measuring instruments which are installed in, at or near the ocean, comprise ocean bottom units, buoys and tide gauges. The ocean bottom units consist of pressure sensors and/or ocean bottom seismometers. The buoys are equipped with GPS technology and meteorological instruments. Also the tide gauges, which measure water levels along the coastline and on the islands, include GPS instruments.

The acquisition of bathymetric data plays an important role for modelling in the GITEWS context.