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take off from the ice again, forcing the cells to cope with high currents of up to 68 amperes during launch phase. Tests with the hexacopter at temperatures of -7�� C proved the currents to be unproblematic. Meanwhile, the AUV was deployed and the inertial navigation system alignment procedure was started, giving the operator time to observe the ice drift and adjust the AUV���s mission fle accordingly. After two dives in the ice-marArctic Deployment gin zone and a total mission time Initial Arctic deployment of the of about 3.5 hours submerged, hexacopter took place in the Fram the AUV was recovered and PoStrait in July 2012 during expedilarstern approached the position tion ARK-XXVII/2 using the RV Poof the hexacopter. larstern. When the hexacopter came In order to mark the ice edge into sight, it was woken up from and prepare an under-ice dive of sleep mode and fown back to PoAWI���s Bluefn-21 AUV, the hexalarstern. It landed back safely on copter was deployed at a position Map showing the hexacopter���s drift and the development the vessel after having spent 5.5 close to 79 degrees 50��� north and of PAR values over time. hours on the ice. Waking up the 03 degrees 40��� east. The ice feld hexacopter from its sleep mode consisted of fast moving, different-sized, separate ice foes. and lifting off from the ice were carried out without any Polarstern���s radar was used to determine the general orienproblems. tation of the ice edge and to fnd suitable foes to mark the During a second deployment on the following day, the feld. hexacopter logged another 5.5 hours on the ice. The maxiEventually, the hexacopter lifted off from Polarstern���s mum distance between the hexacopter and Polarstern while stern deck and landed on the ice within sight range. An adstill receiving a signal was 3 kilometers. The hexacopter ditional GPS transmitter was deployed using an RIB 1 kilodrifted to the southwest following a heading of roughly 247 meter further east to clearly mark the ice edge���s orientation. degrees at an average speed of about 1 kilometer per hour. With Polarstern leaving the area, the hexacopter started to The orientation of the ice edge was almost 90 degrees, with transmit its position and gather PAR data. the ice in the north. THIRD DIMENSION REDUCES OPS TIME The OE14-530 3D Color Camera provides real-time 3D images of the subsea workspace. Optimised for use in subsea tele-robotic applications the OE14-530 provides the ROV operator with a comfortable and natural 3D view of manipulator operations with a wide field of view for optimum coverage and enhanced depth perception enabling accurate positioning, faster performance of tasks and reducing mage. the risk of damage. ������ Cost-effective stereo 3D processing subsea ������ Multi-standard HD/SD video capability ������ Compact design ������ Flexible connectivity options Visit us at ������ Interfaces easily with most commercial-off-the shelf active or passive 3D displays Stand N1 THE FULL PICTURE Telephone: +44 1224 226500 km.camsales.uk@kongsberg.com www.sea-technology.com www.km.kongsberg.com/cameras FEBRUARY 2013 / st 63