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ROPOS Knife to Recover a Transponder

During Leg 4 of the VISIONS'13 cruise, old battery-powered transponders were recovered because they present navigation hazards. A sharp knife held in the manipulator is used to cut the 150-200 m tether at its base, and it and the transponder come to the surface where they are recovered on the ship.

Photo credit: NSF-OOI/UW/CSSF

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