Fetch1 Autonomous Underwater Vehicle (AUV) sampling the water column not far from Aquarius. This kind of maneuver is called a "yo-yo". When you combine a "yo-yo" maneuver with "mowing the lawn", an AUV can rapidly obtain a 3D view of what the ocean is doing. Video courtesy of Bonaire 2008: Exploring Coral Reef Sustainability with New Technologies Exploration, NOAA-OE.