The Sonar Viewer is a downloadable PC-based software application that plays back any file recorded with a sonar-enabled product with an MMC/SD memory card slot. Features include:

* USB MMC Card Reader support
* Outputs chart information in Excel spreadsheet format
* New “User Defined Regions” allows the user to display different user-defined color schemes for surface clutter, fish returns, and bottom tracking
* Adjustable range, zoom, sensitivity, color line, noise rejection, surface clarity, etc. of the recorded file
* Color interpretation of sonar signals can be user defined
* Operates like a Windows Multimedia Player with forward, reverse, pause, fast forward, fast reverse, and scroll buttons
* Adjustments update the entire record displayed
* Window can be dynamically sized on your monitor
* Mouse cursor shows GPS position, depth and sounding number anywhere on the visible record.
Image via Wikipedia
Download Sonar Viewer