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The application of multibeam echosounder for seabed topographic mapping is commonly used recently. Multibeam echosounder is an efficient tool to get a wide seabed coverage for each measurement ping, since it can produce high-resolution seabed topography maps. These maps can be used for further investigation or exploration, such as geomorphology and marine habitats studies. RV Baruna Jaya IV, which is operated by Laboratory for Marine Survey Technology – BPPT, had been equipped with a Germany technology, a hull mounted multibeam echosounder system of Seabeam 1050D. The Seabeam 1050D allows to cover the seabed using 126 beams simultaneously in both sides (port and starboard). RV Baruna Jaya IV and RV Okeanos Explorer of NOAA conducted a joint Indonesia U.S. Expedition to Sangihe Talaud waters (INDEX SATAL) in the northern area of the North Sulawesi Province during July August, 2010. While seabed topography which less than 2000m was covered by Seabeam 1050D system, the deeper area between 2000m and 6000m was covered by Simrad EM-302 system from RV Okeanos Explorer. The result shows that seabed Sangihe Talaud waters has a vary seabed topography. In addition, the resulted map showed a 1600m height of seamount, risen up from the depth of 2300m to 710m below the sea surface. Others geological features can be identified according to high resolution bathymetry map resulted from this study.

SEABED TOPOGRAPHY MAPPING IN SANGIHE TALAUD WATERS USING MULTIBEAM ECHOSOUNDER