Kongsberg Mesotech Ltd announced the release of the 1171 Series Multi Frequency High- Resolution Fan/Cone Sonar Head.The operating frequency of the cone transducer can be selected by choosing one of four frequencies and the frequency of the fan can be selected by choosing one of three frequencies, or by using “tunable” mode where the frequency can be changed in 5 kHz increments. “This new sonar head operates at high frequency to provide ultra-fine resolution data, delivering image quality similar to Mesotech scanning sonars,” says Konsberg Mesotech Product Manager Bogdan Constantinescu.