Figure 1. The Fetch1 autonomous underwater vehicle (AUV), like other AUVs, is a kind of taxicab for sensors. This free-swimming robot is about 2 meters (m)/6.5 feet (ft) long, weighs about 100 kilograms (220 pounds), and can go 150 m (492 ft) deep. It can cover 16 kilometers (10 miles) before its batteries need to be recharged. The data from the mission are stored on two computers inside. Image courtesy of Bonaire 2008: Exploring Coral Reef Sustainability with New Technologies expedition.