New Simrad SX93 Sonar Detects Massive School of Mackerel

The all new SX93 sonar use two high specification computers, one dedicated to processing the complex beam-forming technology unique to Simrad and the other to control operator selectable functions including full 360 degree beam stabilization, dual beam selection, multi-frequency operation, audio output and dual mode presentation - where the sonar can operate on two independently controllable frequencies. The sonar was used in dual mode presentation during the trip, with one mode dedicated to long range detection typically using 3 Degree tilt and the second mode for short range catch control using an average of 12 Degree tilt.

Bjorn Kalestad from Simrad and Graeme Smith from Echomaster sailed with the Sunbeam on their first trip with the SX93 to ensure everything was working to specification and to provide training on its many unique features.

During the trip a number of massive schools of mackerel were detected. One school covered an area 3.5 kilometres long and some 50 metres deep and was the largest single school anyone on board had ever seen recorded on a sonar. Based on scientific surveys of mackerel by the Institute of Marine Research in Bergen, the school has been estimated to contain 200,000 tons of fish, more than the total Norwegian mackerel quota. It was detected in less than five seconds by one sonar ping!

A growing trend in Norway has been the installation of scientific acoustic equipment on board fishing vessels, enabling Norwegian skippers to participate in scientific data collection in exchange for extra quota. The SX93 on Sunbeam is equipped with a unique, dedicated Scientific Output facility, making it the only UK vessel with a multi-frequency sonar operating from 20 to 30 Khz., capable of participating in research projects.

Since its introduction in 2007 156 SX series sonars have been sold world wide. For more details, please do not hesiate to contact us.