[25] Subsequent for the early MBES bathymetric surveys and at some time when one frequency aspect scan sonar experienced started to generate high-quality photographs on the seabed that were able to providing a degree of discrimination between differing types of sediments, the probable of your echo amplitudes from a MBES https://hydrographicsurveyinbangl94837.59bloggers.com/32870516/top-hydrographic-survey-in-bangladesh-secrets