Left at 12:30 with partly cloudy skies in about 20 knots of wind. We arrived at the first recovery location just after 4:00. An acoustic signal is sent down 355 meters to where the seismometer has been resting on the ocean floor for just under a year. This wakes up its receiver and the transponder sends back a signal to acknowledge our arrival. We send down a different signal to burn through a nichrome wire, releasing the seismometer from its anchor. The seismometer takes about 10 minutes to reach the surface from this depth.
We had to make several passes on the floating instrument, in order to be close enough to the Oceanus to attach the tag line. Another line was used to attach the seismometer to the crane, while a third tag line was attached to keep it from striking our hull. The seismometer was lifted and secured to the deck. We were underway to our next deployment by 5:30.