Sea Technology

APR 2014

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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46 st / April 2014 The buoy can be deployed in the ocean to support ocean observatories or other subsea equipment with a large power load. The buoy's standard umbilical pro- vides fber-optic and 240 volts to the seabed and telem- etry to the shore. Data can be downloaded remotely anywhere in the world. Using built-in PLCs, the buoy wakes at set times and starts a marine-grade generator. The generator provides 120 to 240 volts at 4.8 kilowatts (continuous) to the seabed. The generator works to an angle of 45° incline. An in-built velocimeter prevents it from starting in rough sea states. Fuel within the buoy has 250-liter diesel capacity that is triple bunded. The USS currently relies on hybrid cables for elec- tricity and optical communications as well as retrieval and deployment, having triple armoring and a 44-kilonewton breaking load. All cables subsea are isolated and wet mateable. When the camera system is not in use, it retracts into a UV-light docking station with a combina- tion of remotely controlled wip- ers to eliminate biofouling. Results from sea trials have indicated all degrees of free- dom. The USS extends 10 meters from the base, 12.1 meters high from the horizon and 5.4 meters below the horizon. Repeat- ability and accuracy for automatic surveys (as opposed to manually driving) showed the robot navigated to expected position. Error accuracies are as follows: slew +/- 0.26°; lift expediting data analysis and sub- sequent reporting. Extension and retraction of the boom is driven by a complex ar- ray of guidelines, which are con- trolled by hydraulic pumps. Similarly, hydraulic pumps con- trol the slew, lift and luff of the robot. This hydraulic system is over an electric system that the buoy powers from the surface. (Top) USS software showing way- points for repetitive coral surveys for marine construction monitor- ing. (Right) The USS undertaking a terrestrial inspection at almost full extension . Acoustic Doppler & Imaging Technologies • Easy integration – custom data formats available • 10/100-Base-T Ethernet Interface included • Support for simultaneous, independent serial communications with diferent output formats • Support for dual frequency confgurations • Simultaneous Current Profling Included • 1200KHz, 600KHz, and 300KHz available • Smallest form factor in the industry Rowe Technologies SeaPILOT ofers a full range of DVL solutions from shallow water to full ocean depth Looking for a DVL? Coming Soon DVL for Small Observation Class ROVs! CUSTOM OEM SOLUTIONS AVAILABLE 1200KHz DVL on OceanServer Iver3-450 Nano (4.5" OD) AUV Rowe Technologies, Inc. 12655 Danielson Court. Suite 306. Poway, CA 92064 USA email: • • Phone: +1-858-842-3020 Now you have a choice! AprilBook.indd 46 4/7/14 12:19 PM

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