The Easytrack Nexus hydroacoustic transducer (ultra-short baseline system; USBL) is located in the starboard hull of the catamaran. During operation, the transducer is extended below the keel by a hydraulic outrigger to a distance of about 1 m while maintaining horizontal visibility of 360°. The USBL head's lowering/lifting system allows the transducer to be inspected both at sea and in port, without the need to dock the vessel, and the transducer can be safely stowed inside the hull for the duration of the survey. The device works with the following systems: GPS RTK, IMU, ROV, SBP, SSS and Qinsy (QPS) software.
We use the USBL underwater navigation system, model Easytrack Nexus by Applied Acoustics, when we work with data recording devices while towing them behind the vessel (such as Side Scan Sonar, Sub-bottom profiler), or others requiring underwater navigation while conducting underwater target inspection such as Remotely operated underwater vehicles (ROV).
Only used on r/v Oceanograf cruises.