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- Q1164536 subject Q8691651.
- Q1164536 subject Q8826767.
- Q1164536 abstract "Echo sounding is a type of SONAR used to determine the depth of water by transmitting sound pulses into water. The time interval between emission and return of a pulse is recorded, which is used to determine the depth of water along with the speed of sound in water at the time. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes. Echo sounding can also refer to hydroacoustic "echo sounders" defined as active sound in water (sonar) used to study fish. Hydroacoustic assessments have traditionally employed mobile surveys from boats to evaluate fish biomass and spatial distributions. Conversely, fixed-location techniques use stationary transducers to monitor passing fish.The word sounding is used for all types of depth measurements, including those that don't use sound, and is unrelated in origin to the word sound in the sense of noise or tones. Echo sounding is a more rapid method of measuring depth than the previous technique of lowering a sounding line until it touched bottom.".
- Q1164536 thumbnail Echo_Sounding_USN.jpg?width=300.
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- Q1164536 wikiPageWikiLink Q8691651.
- Q1164536 wikiPageWikiLink Q8826767.
- Q1164536 wikiPageWikiLink Q9430.
- Q1164536 comment "Echo sounding is a type of SONAR used to determine the depth of water by transmitting sound pulses into water. The time interval between emission and return of a pulse is recorded, which is used to determine the depth of water along with the speed of sound in water at the time. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes.".
- Q1164536 label "Echo sounding".
- Q1164536 depiction Echo_Sounding_USN.jpg.