Water visibility is arguably one of the most important factors when trying to complete a successful inspection mission with a VideoRay ROV.  Though the ROV camera has a few options to assist with image quality in low light / low clarity situations, such as shutter speed, wide dynamic range, and LYYN real time video enhancement, it can only see so much when conditions are poor.  When trying to image structures, vessel hulls, or trying to locate unknown targets in low visibility or even complete blacked out environments, an acoustic imaging device, or Sonar, is an essential tool.