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10 st / November 2017 www.sea-technology.com its predecessors 5000 and 5000V2 by employing advanced signal-processing techniques and superior acoustic design to improve the overall along-track target resolution by a fac- tor of two. The across-track resolution of the 5900 is main- tained at a constant 3.75 cm over all operating ranges. The Klein 5900, unique in its class, is designed to oper- ate and produce crisp, sharp high-contrast imagery even in adverse operating conditions or in littoral waters where sea waves have a greater effect on the towing vessel. Dynamic focus and beam steering are two of the signal- processing techniques contributing to the 5900 imaging performance. In the Klein 5900, there are 28 independent T he Belgian Navy and NATO-CMRE hosted the North Sea Unmanned MCM Trials June 2017. This challenge was an assessment of the ability for commercial off-the-shelf (COTS) autonomous systems to perform mine countermea- sure tasks. The activities took place in the vicinity of the NB- 01 military exercise zone, outside of the Zeebrugge Navy Base. The trial was open to the participation of COTS auton- omous underwater and surface systems (e.g., AUV, USV). All vehicles were required to perform autonomously in a challenging environment populated with realistic mine-like targets including cylindrical, MANTA, ROCKAN and teth- ered types. Vehicles were assigned 10 hours to complete the mission. 5900 Multibeam Side Scan Klein Marine Systems participated in this exercise deploy- ing its flagship 5900 high-resolution, high-speed multibeam side scan sonar, specifically designed to obtain high-quality images even in adverse sea conditions. Klein partnered with Elbit Systems, manufacturer of the USV Seagull, a versatile platform for mine hunting and anti-submarine warfare. The Seagull is particularly suited to operate in high sea states and, therefore, an ideal match for the demanding littoral en- vironment of the Belgium and Dutch coast. Elbit has devel- oped for the Klein 5900 an efficient, fully automated launch and recovery system (LARS) particularly suited for opera- tions in high seas. Klein pioneered the first COTS multibeam side scan so- nar. Unlike single-beam side scan sonar systems, whose along-track resolution degrades with increasing range, dy- namically focused multibeam side scan systems deliver constant along-track resolution, with 100 percent bottom coverage, at towing speeds that are three to four times higher than possible with single-beam systems. The supe- rior high-resolution and high-speed performance has made the multibeam product line (for example, the 5000 series) extremely successful with many of the world's navies and government organizations for route surveys and detection of mine-like objects (MLOs). The high-resolution multibeam side scan sonar Klein 5900 improves on the performance of Multibeam Side Scan For Unmanned MCM Klein 5900 Performs During Naval Mine Countermeasure Trials By Giuseppe Di Stefano (Top) Klein 5900's 28 segments are electronically delayed to compose synthetic beams focused to the selected range. (Bot- tom) Synthetic beams created to point orthogonally to course over ground, as opposed to orthogonally to the towfish head- ing.