Unmanned Systems Technology 025 | iXblue DriX I Maintenance I UGVs I IDEX 2019 I Planck Aero Shearwater I Sky Power hybrid system I Delph Dynamics RH4 I GCSs I StreetDrone Twizy I Oceanology Americas 2019

94 Show report | Oceanology International Americas 2019 against its previous USBL system, and found that the standard deviation of positioning accuracy was roughly the same whether distances of 10, 20 or 40 m from the beacon were being used as a position test reference. By comparison, Geosurvey Mexicana’s previous USBL system doubled its standard deviation at 20 m distance compared with 10 m, and doubled again at 40 m. “The Subsonus features a calibrated hydrophone array, combined with an internal tightly coupled INS,” said Romain Pare. “The unit can measure the speed of sound through water, which means the system is self-tuning. No extra equipment or user intervention is required to set it up, reducing the risk of operator errors.” At 1000 m distance, Subsonus gives positions accurate to 5.0 m, while measuring roll and pitch to 0.1° and heading to 0.3°, with an output data rate of up to 1000 Hz. The system has a footprint of 106 x 106 x 93 mm, and typically consumes 10 W during operation, up to a peak of 25 W. Kongsberg Maritime attended the show to discuss the Eelume AUV. Eelume was established following 10 years of research at the Norwegian University of Science and Technology into ‘snake-like’ robotics. As Eelume’s partner for investment and technological purposes, Kongsberg is integrating its own autonomy solutions and capabilities derived from its AUV portfolio (such as the Hugin, Munin, and Remus AUVs) into future Eelume system configurations. “The articulated design configuration for the Eelume provides it with some unique capabilities,” Kongsberg Maritime’s David Mackay said. “The slim cylindrical body – just 20 cm in diameter – flexible body joints and thruster configuration gives it significant agility and manoeuvrability, with full six- degrees-of-freedom in movement, to act as a dextrous subsea intervention tool. “It also has a modular design that is scalable and can be configured for a range of underwater tasks. It can be configured with one or more flexible articulated joint modules, thruster modules, sensor modules and battery modules. It can also be controlled over wired and wireless Ethernet comms links.” The current Eelume EELY500 system is rated to a depth of 500 m, and is designed for high-definition inspection and survey operations in confined and hard-to-access spaces. It can operate horizontally, vertically and at all attitudes in between, and is capable of full 360° body rotation for internal inspections of pipes and other channels. Over the next several months the first Eelumes will be deployed with underwater docking garages for inspection, maintenance and repair operations on Equinor’s Asgard oilfield in the North Sea. Initial proving trials will demonstrate them working under tethered operator control, but planned future trials will test battery-operated, tetherless and autonomous versions. EdgeTech displayed its 2200 and 2205 sonar systems, which are designed for integration into ROVs and AUVs respectively. The units are modular and can be configured to collect sidescan sonar imagery, sub-bottom profiles and bathymetric data, singly or in concert April/May 2019 | Unmanned Systems Technology The Subsonus USBL positioning system Eelume’s ‘snake-like’ AUV EdgeTech’s 2200 ROV/UAV sonar system