Deployed at our Fraser Delta site in the Strait of Georgia are various sonar systems. In addition to the upward looking echo-sounder (200 kHz ZAP), we have a downward looking scanning sonar built by Imagenex. Shown here is a series of single scan images, and when compiled into an animation, the time-lapsed set of hourly images shows the changes detected by the sonar. This scanning sonar sweeps out a radial scan of...