The marine profiling instruments are set up to motor up and down the cable to prescribed depths. Special bumpers are positioned at both ends of the profile range. See: http://www.naturalsciences.org/education/arctic/

Image ID: arct0006, NOAA At The Ends of the Earth Collection
Location: Arctic Ocean, north of western Russia
Photo Date: 2006 August
Photographer: Mike Dunn, NC State Museum of Natural Sciences
Credit: NOAA Climate Program Office, NABOS 2006 Expedition

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