The Acoustic Sensor of the Dorsey Fathometer (model 808) mounted on one
4.7 (733) In stock
![](https://www.researchgate.net/publication/233116854/figure/fig4/AS:339919462518795@1458054523667/The-Acoustic-Sensor-of-the-Dorsey-Fathometer-model-808-mounted-on-one-of-the-Surveys.png)
![](https://photolib.noaa.gov/Portals/0//GravityImages/46696/ProportionalFixedWidth/theb216531184x220x180.jpg)
NOAA Photo Library > Collections > Coast & Geodetic Survey > Nautical Charting > Soundings > Acoustic Sound Systems
![](https://www.researchgate.net/profile/Krishna-Chaitanya-21/publication/321652569/figure/fig1/AS:687321074638849@1540881522154/Chart-showing-clinical-Symptoms-of-Headache-nasal-itching-sneezes-rhinorrhea-during_Q320.jpg)
The Acoustic Sensor of the Dorsey Fathometer (model 808) mounted on one
NOAA Photo Library > Collections > Coast & Geodetic Survey > Nautical Charting > Soundings > Acoustic Sound Systems
![](https://www.mdpi.com/sensors/sensors-23-08217/article_deploy/html/images/sensors-23-08217-g015-550.jpg)
Sensors, Free Full-Text
![](https://www.researchgate.net/profile/John-Cloud/publication/249722209/figure/fig1/AS:652589167280128@1532600790314/The-CORONA-Camera-Systems_Q320.jpg)
John CLOUD, Historian, PhD in Geography, University of California at Santa Barbara, 2000, National Oceanic and Atmospheric Administration, HI, NOAA, NOAA Central Library
NOAA Photo Library > Collections > Coast & Geodetic Survey > Nautical Charting > Soundings > Acoustic Sound Systems
![](https://www.mdpi.com/sensors/sensors-23-08217/article_deploy/html/images/sensors-23-08217-g002-550.jpg)
Sensors, Free Full-Text
This pendant speaker drops down from a reinforced cable suspension system for a unique yet functional style. Being high vaulted in an indoor space provides powerful sound to the surrounding area. p strong OSD’s Nero Arc SUB 8 Pendant Speaker /strong is Designed for Commercial and Demanding Applications. Ideal for Installation Where Conventional Ceiling or In-Wall Speakers are Limited by Unique or Challenging Architectural Constraints.
![](https://m.media-amazon.com/images/I/51jwlc1Y2WL._AC_UF894,1000_QL80_.jpg)
OSD Nero Arc 8 2 Way Coaxial Pendant Style Speaker 8Ohm/70V Black
![](https://oceanexplorer.noaa.gov/history/docs/media/dorsey-500.jpg)
History: Historical Documents: Radio Talk on Echo Sounding: NOAA Office of Ocean Exploration and Research
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