Titrating water samples from Oregon Shelf and Oregon Offshore sites for oxygen analysis. Credit: S. Baxstrom, University of Washington, V’ 22.

The MARUM Germany Overview Sonar at the seafloor, in need of a little troubleshooting. UW/NSF-OOI/CSSF; Dive R2223; V22

A sliver of moon peaking from the darkness. Credit: N. Wu, University of Washington, V22

Shrunken decorated Styrofoam cup. Credit: K. Whitmer, University of Washington, V22.

Pacific White-Sided Dolphins. Credit: K. Whitmer, University of Washington, V22.

CTD Rosette being lifted into the water at Slope Base. Credit: K. Whitmer, University of Washington, V22.

Mat (that was apparently made in the USA) on a microbial mat. Credit: UW/NSF-OOI/CSSF; V22.

Filtering station. Credit: K. Whitmer, University of Washington, V22.

One of the engines in the R/V Thomas G. Thompson engine room. Credit: K. Whitmer, University of Washington, V22.

Titrations! Credit: K. Whitmer, University of Washington, V22.

: Mostly overcast weather as we transit to the offshore site. Credit: K. Whitmer, University of Washington, V22.

On the ship bridge. Credit: J. Pineda, University of Washington; V22.

CTD rosette just pulled out of the water, ready for sampling. Credit: J. Pineda, University of Washington; V22.

Pressure-shrunken Styrofoam cup next to a normal cup. Credit: J. Pineda, University of Washington; V22.

ROPOS instrument recovery from underneath sediment with brittle stars on surrounding seafloor. Credit: J. Pineda, University of Washington; V22

View inside the ROPOS watch room with methane bubbles on main screen. Credit: J. Pineda, University of Washington; V22.

Southern Hydrate Ridge rocks collected by ROPOS. Credit: J. Pineda, University of Washington; V22.

Dispensing my seawater samples into a beaker to be distributed into individual bottles for preservation. Credit: N. Wu, University of Washington; V22.

Co-Chief Scientist Julie Nelson guiding us through seawater collection from ROPOS Niskin bottles. Credit: J. Pineda, University of Washington; V22.

Bridge of the R/V Thompson in the early morning fog. Credit: G. Diephuis, University of Washington, V22.

ROPOS arm freeing osmotic water sampler from tool basket. Credit. UW/NSF-OOI/CSSF, V22.

Dahl’s dolphins from the deck of the R/V Thompson. Credit: G. Diephuis, University of Washington, V22.

ROPOS control room seeing the old LV01B secondary node on the screen. Credit: G. Diephuis, University of Washington, V22.

Shrunken cup from ~2900 m vs. normal cup of original size. Credit: A. Rose, University of Washington; V22.

ROPOS adjusting a cable with a sea star on it. Credit: UW/NSF-OOI/CSSF; V22.

The “guts” of ROPOS. Credit: A.Rashid, University of Washington, V22

Pacific White-Sided dolphins. Credit: A. Rashid, University of Washington, V22.