I have been thinking about ways to reduce the leak possibility on the dry portion of my ROV. One thought is to pressurize the dry chamber before the dive. If I took the internal pressure to 150psig, then at 330’ it would be equal to ambient pressure. Has anyone experimented with this before?
A second thought is to install a strong bladder such as a hot water bottle inside the dry chamber and plumb it to the wet side. This would allow equalization at all depth.
The concept is so simple, I am sure that I am missing something obvious that would not allow it to work.