Should the wire (established at a particular depth by a program of weights and buoys) encountered an obstruction, it could become taut and type a "V," revealing the depth and situation of submerged rocks and also other obstructions. – The Chesapeake Bay is the largest estuary in North America and https://hydrographicsurveyinbangl26160.blog-gold.com/40623787/hydrographic-survey-options