The upper-water-column autonomous underwater vehicle (AUV) is designed to rapidly acquire multiple large-volume seawater samples at distinct locations throughout the upper water column with “gulper” water samplers.

MBARI Gulper AUV At Deepwater Horizon Spill

Each gulper contains two liters of volume. When ballasting operations are conducted, the gulpers are full of seawater. Therefore, the AUV will not be able to dive if the gulpers are full of air. They need to be in the “cocked” position before launch so the upper chambers can fill with seawater when the AUV is launched.

Larry Bird prepares water sampling chambers on the gulper AUV

After the mission, these water samples are analyzed either aboard the mother ship or back at the laboratory. An ongoing software effort is developing the capability to trigger the gulpers based on the measurements of other on-board instruments.

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