Setting up all of the bottles on the rosette. There are two casts at each station, one shallow and one deep. Seawater collected from these casts is used for trace-metal analysis (including mercury). If you look closely you will see shower caps on the tops and bottoms of each bottle, these are the openings that are protected as the bottles are transfered in and out of the clean van and prepared for deployment to prevent any contamination. Everyone using water from these casts helps out with deployment, recovery and transporting bottles.