[25] Subsequent on the early MBES bathymetric surveys and at time when one frequency aspect scan sonar experienced started to supply high-quality illustrations or photos on the seabed which were capable of furnishing a diploma of discrimination among differing kinds of sediments, the likely of the echo amplitudes from the https://hydrographicsurveyinbangl97694.bloggosite.com/38944936/fascination-about-hydrographic-survey-in-dhaka