During ROPOS Dive R1730, the NSF-OOI-RSN high-definition video camera was tested successfully. The camera was installed in 2013 and 1-year later it worked extremely well. A test 3-D thermistor array (bottom right) that was installed last year rests on a diffuse flow site, covered in microbial filaments. To the left, a cabled 3-D thermistor array will replace the uncabled system. Photo credit: NSF-OOI/UW/CSSF; Dive R1730; V14.