Sentry Vehicle (IMAGE) U.S. National Science Foundation Caption Sentry, a one-of-a-kind undersea vehicle, was used successfully for the first time during an oceanographic cruise off the US west coast from July 22 - Aug. 5, 2008. Credit University of Washington 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.