[twenty five] Subsequent for the early MBES bathymetric surveys and at some time when single frequency aspect scan sonar had started to supply good quality visuals with the seabed which were effective at supplying a diploma of discrimination in between different types of sediments, the probable from the echo amplitudes https://hydrographicsurveyindhaka02222.ageeksblog.com/31383677/hydrographic-survey-in-dhaka-can-be-fun-for-anyone