H2O (Hawaii-2 Observatory)—In 1998, scientists used the remotely operated vehicles (ROV) Jason and Medea to create the pioneering long-term seafloor observatory called H2O (Hawaii-2 Observatory). They spliced an abandoned submarine telephone cable into a termination frame. The frame relays power and communications to a junction box, which serves as an electrical outlet for scientific instruments. (Illustration by Jayne Doucette, Woods Hole Oceasnographic Institution)[back]
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