In support of EAF-Nansen Programme Themes 9 and 10, this video is part of a series of videos that support the descriptions provided in the Rosette water sampling R/V Dr. Fridtjof Nansen protocol about the different methods for collecting the various water samples on board R/V Dr. Fridtjof Nansen from the rosette water sampler. The steps described here are specific to the equipment on board R/V Dr. Fridtjof Nansen but can be modified for use in other laboratories as long as differences in equipment are considered. This particular video provides a description of how to collect salinity samples from a CTD rosette bottle.