Fathometri
Fathometri, or fathometry, is the measurement of the depth of water by emitting an acoustic signal and measuring the time it takes for the echo to return from the seabed or lakebed. The instrument used is commonly called a fathometer or depth sounder; modern systems are often referred to as echo sounders. The term relates to the unit fathom, a traditional measure of depth.
Principle and theory: A transducer mounted on a vessel or platform sends a brief downward pulse. The
Technologies and methods: Single-beam echosounders provide a single depth value directly beneath the source, while multibeam
Applications and significance: Fathometry is essential in hydrography, navigation, offshore engineering, dredging, and environmental studies. It