In either case, the depths calculated had to be read manually and recorded, as did the place of each and every measurement with regards to mapped reference details as determined by three-place sextant fixes. The method was labor-intense and time-consuming and, While Each individual person depth measurement can be exact, https://johnnykmgvm.myparisblog.com/32987596/the-best-side-of-hydrographic-survey-in-dhaka