NEREUS/Odyssey II A self-contained underwater mass-spectrometer system SPECIFICATIONS Length: 2.2 m (87 inches) Diameter: 0.58 m (23 inches) Weight in Air: ~200 kg (441 lbs) Buoyancy:~+0.5 kg (+1lbs.) Depth Rating: max: 3000m {limitation: batt (200m)} About NEREUS/Odyssey II Speed: 1-3 knots Range / Endurance: 44 km / NEREUS (novel, efficient, rapid evaluation of underwater spectra) is a self-contained 8 hours underwater mass-spectrometer system capable of continuous measurements of gases and Batteries: LiPoly , 2.0 kWh - vapors dissolved in the water column. Rapid in-situ measurement minimizes or elimi- Bluefin Battery nates artifacts that are often a problem when collecting and storing samples for analysis of volatile constituents, and provides higher spatial and temporal resolution of chemical EKF Navigation: accuracy < 3% of distance traveled patterns than is possible with conventional techniques. Communications: freewave NEREUS has been integrated with an MIT Sea Grant Odys- ISM-band radio; WHOI sey class submersible to create the Nereus/Odyssey II. The acoustic modem, 25 kHz vehicle, in turn, has been integrated into an underwater data Chemical Sensors: NEREUS network (the NEREUS network) to obtain real-time chemi- mass spectrometer; Hydrolab cal data. Underwater mass spectrometers such as NEREUS multiprobe (D.O., pH, CTD, have wide application to many practical problems, such as ORP, Turbidity pollution monitoring and energy production, as well as to MIT Sea Grant AUV Lab fundamental Earth systems research. Dedicated to the development and application of autonomous NEREUS, developed in the lab of Leonhard Professor of Civil and Environmental Engi- underwater vehicles since 1989, neering, Harold Hemond, has been supported in part by MIT Sea Grant and developed MIT Sea Grant's AUV Lab is a in cooperation with the MIT Sea Grant AUV Lab. leading developer of advanced unmanned marine robots. Because our vehicles can function without tethers, cables, or remote control, they have a multitude of applications in oceanography, environmental monitoring, and underwater resource studies. The laboratory also serves as a training ground for students, visiting engineers, and scientists, from around the world, who learn from and contribute to the Lab's MIT Sea Grant AUV Lab 292 Main St, E38-300 Cambridge, MA 02142 Phone: 617 253-3402 Fax: 617 258-5730 e-mail: [email protected] web: http://auvlab.mit.edu MITSG 10‐4 .