Digital Library Search
![Figure 7 ship4377.jpg Figure 7](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4377.jpg?itok=8c4jqxL5)
Description
Figure 7. Autonomous ultrasonic tide recorder. This instrument was mounted onthe bottom and emitted sound waves that reflected off the water surface. As the water level changed, the instrument would record the apparent changes in depth. This instrument was developed for Crouzet Marine Oceanology Corporation from aprototype developed by the Studies and Research Department of France Electric. (Image credit: Oceanographic Museum of Monaco | Y. Berard)