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A teacher retrieves a CTD-rosette from the waters of the Bering Strait on the ICESCAPE mission in June 2011.
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Researchers deploy a CTD-rosette at night.
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Researchers watch while a CTD-rosette is lowered into the water from EPA's Bold research vessel.
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A CTD-rosette is lowered to just under the water surface from NOAA Ship PISCES.
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Technicians prepare a CTD-rosette for sampling by pulling back and securing the cables that hold the Niskin bottles in their open positions. When the rosette is in the water, someone on the ship will remotely trigger sampling, and the circular cable holder at the top of the rosette will release cables, closing the bottles one by one at specific water depths.
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Crew of the NOAA Ship PISCES recover a large CTD-rosette.
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Researchers prepare a CTD-rosette for taking measurements and water samples at the Deep Water Horizon oil spill site.
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A scientist collects water from a Niskin bottles directly into a syringe type filtration container on NOAA Ship PISCES.
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A CTD-rosette is ready for deployment. The top section holds the Niskin bottless while the bottom section holds the CTD instrument and other electronic sensors (such as a fluorometer to measure chlorophyll fluorescence and a transmissometer to measure turbidity).
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A CTD-rosette comes up out of the water just before it gets recovered and brought on deck of the ship.