In either scenario, the depths measured had to be read through manually and recorded, as did the place of each measurement with regards to mapped reference details as based on three-place sextant fixes. The method was labor-intensive and time-consuming and, Even though Every single person depth measurement may very well https://hydrographicsurvey51594.blogdal.com/32782116/the-greatest-guide-to-hydrographic-survey-in-bangladesh