A brightly lit remotely operated vehicle explores a dark ocean floor connected to a yellow tether.
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ROV Deep Discoverer
Top-down view of remotely operated vehicle (ROV) Deep Discoverer, captured from ROV Seirios during Dive 11 of the 2026 American Samoa ROV + Mapping Exploration expedition. Seirios is tethered via a cable to NOAA Ship Okeanos Explorer and Deep Discoverer, absorbing ship heave to keep Deep Discoverer stable while providing power, data transfer, and an expanded view for ROV pilots.
Credit

NOAA Ocean Exploration, 2026 American Samoa ROV + Mapping Exploration