Urraca Vessel (IMAGE) Smithsonian Tropical Research Institute Caption For 11 days, scientists lived aboard STRI's R/V Urraca, a 95-foot vessel, part of the NSF/UNOLS fleet (a set of vessels designated for NSF-sponsored research). Credit Marcos Guerra Usage Restrictions Please credit to Marcos Guerra, Smithsonian Tropical Research Institute 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.