In possibly scenario, the depths calculated had to be go through manually and recorded, as did the placement of each measurement with regard to mapped reference points as determined by 3-position sextant fixes. The method was labor-intensive and time-consuming and, While Just about every personal depth measurement may be precise, https://hydrographic-survey-in-ba08406.tinyblogging.com/facts-about-hydrographic-survey-in-dhaka-revealed-76157057