Leonard Gajewski - Maritime Institute, Dhgi Targ ۴۱, ۸۰-۸۳۰ Wsk, Poland
Waclaw Morgas - Maritime Institute, Dhgi Targ ۴۱, ۸۰-۸۳۰ Wsk, Poland
Stanislaw Rudowski - Maritime Institute, Dhgi Targ ۴۱, ۸۰-۸۳۰ Wsk, Poland

Pilot investigations were carried out with the objective of testing the usefilness of measuring the density of the mud/iuater medium to determine nautical depths in the Port of Gdzhsk. Results show significant diierences between the nautical deph and the depth determined by acoustic methods at loose bulk cargo terminals. It was also found that too large depth values were obtained when 33 KHz transducers were used Applicability of acoustic profiling for distinguishing structure of deposits which must be dredged was tested