Sub-Sea Enginering Systems

Shanghai Port Construction Co. is responsible for the construction of an underwater dam in the Yangtze River estuary with the purpose of controlling the river current, tide and erosion. Tunnel elements are submerged on the seabed forming a dam of a total length of 50 km, which will be covered with rocks dumped from two 60x80 meter barges. EIVA is contracted by Atlas Hydrographics to supply on-line and off-line software for the two rock-dumping systems, including provision of information about the "as built" structure against the theoretical dam structure. The systems each comprise a/o Atlas FanSweep15 multibeam echosounder, RTK DGPS, motion sensor, sound velocity profiler, and NaviPac, NaviScan, Contour, and specially designed software based on NaviModel.

Promaster Remotely Operated Tool

The Promaster, developed by b&a Industries BV, is a self-contained remotely operated tool, that mates to a load to be deployed by the ship's crane. The ProMaster incorporates its own Dynamic Positioning (DP) system which takes reference from the ship's DGPS system and its own sensors to provide position and offset information to Promaster's control system. With the collaboration of Thomson Marconi Sonar, Mors, Hydrovison and EIVA, new positioning methods have been developed using new software designs and combined survey equipment package. The ProMaster provides a radically new approach to the safe handling, rapid and precise deployment or recovery of heavy loads to depths of up to 3000 meters without the need for guide wires and pre-lay of an LBL acoustic system.

Rock Dumping

EIVA is providing sub-sea engineering contractors with rock dumping systems based on the EIVA software product suite and selected hardware. The combined use of EIVA software with in particular Doppler log, pipe-tracker and multibeam echosounder makes the systems optimal for all sub-sea activities associated with rock dumping, from navigation and operational display of the scenario to final reporting and documentation.