Clear Water Lens

Crude, but effective... When working in very silty water, it may be impossible to see more than a few centimeters. But with a sonar and a clear water lens, you may be able to navigate to where you need and get the image clarity you need for a successful mission. A clear water lens can be as simple as a plastic bag strapped to the front of the ROV like this (scroll down for a sample of how well it can work).