EchoPostSurvey 2.52 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The software is categorized as System Utilities. This free program is an intellectual property of Knudsen Engineering Limited.
From the developer:
Free data viewer for : Knudsen Echosounder Data Files , XTF Side Scan Data and SEG-Y Data. PostSurvey, the newest version for viewing and printing Knudsen 320 series echosounder data, XTF side scan data and SEG-Y data, is available as a free download to anyone interested.
The PostSurvey software provides the capability for offline data playback and printing of multiple KEL 320 Echosounder, XTF and SEGY data files on the PC.
You may want to check out more software, such as MobilePhoto, broadband medic or CopyPod, which might be similar to EchoPostSurvey.