SBP data was acquired by the 16 transducers, hull mounted DATASONICS Mod.CAP-6600 CHIRP-II profiler, with operating frequencies ranging 2-7 KHz. The analog sections were printed in real time on an 22" EPC recorder. The digital data were recorded in the SEG-Y format on MO removable disks and backup on HD, DAT tapes and CD-ROM.
The navigation data were made available to the system by NAVPRO as VESSEL (0,0) at a rate of aproximately 0.5hz. The position data were recovered from the SEG-Y trace data files with an appropriate software (see Appendix 5). For the sake of achieving the maximum accuracies, the data must be converted to the CHIRP position (see Tab.3.1).