Software release note This document describes the software and other changes introduced with the following new software The software upgrade is cvalid for: In dual PC systems, the Processor Unit software is the SX90 program that controls the menu system. operational modes, features and presentations. The Beamformer Unit software controls how the data from the Transceiver Unit are received and processed prior to presentation. In single PC systems, the Processor Unit handles all tasks. Software changes The following changes have been Improved receiver detection Improved stability Scientific output modified • Better noise immunity Documentation changes The user manuals have not been upgraded. The English manuals from January 2010 are still valid. These describe the single PC system hardware components. The sonar functionality is identical for both We strongly recommend that all users upgrade their sonar systems. If you wish to upgrade from a dual PC system to a single PC system, contact your dealer. wish to upgrade, but you will not take advantage of the changes that have been implemented. perform this software update. To carry out the upgrade procedure, you must contact your local dealer for advice. TECHNOLOGY FOR SUSTAINABLE FISHERIES

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