The datum was set to WGS84 and the UTM, zone 33 was chosen for navigation and display, and data acquisition. The time zone was set to the UTC for the instrumental data acquisition. The positioning maps and bathymetric images were produced with GMT [Wessel and Smith (1995)]. The multibeam data were pre processed on board by the PDS2000 and GMT software and ISMAR's routines and scripts, using the PDS-2000 production DTMS or XYZ ASCII converted data. ISMAR's computing center employed two INTEL based PC running the SUSE GNU-Linux and the Microsoft Windows 2000 O.S. in addition to portable computer for data acquisition and personal processing. The Linux machine was used as data repositories using the SAMBA software, providing alse network services like WWW server, to share ongoing information and results, and DHCP and NAT. Photographs and video were taken by digital cameras and video-camera.