Deployment of Moored Sonar Assembly (IMAGE) NOAA National Marine Fisheries Service Caption NOAA Fisheries scientist Robert Levine prepares the upward-facing sonar unit for deployment in Shelikof Strait in February of 2015. Credit: NOAA Credit NOAA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.