W.J. Castle, P.E. & Associates has acquired the JW Fishers Side Scan Sonar 100k/600K and is now able to view large search areas quickly and produce high resolution images of the river bottom up to 40 meters from the sonar head on a laptop or desktop PC. Engineers Rick Parisi and … [Read more...] about W.J. Castle, P.E. & Associates has acquired the JW Fishers Side Scan Sonar 100k/600K