Interesting solution Rich. How much can you see with this camera. I've only played with one and it was focused about an inch in front of the lens, almost no depth of field. I could not see something a couple of feet away so could not use it inside of a wall.Speaking of inspecting underwater with a camera, I wished that I had such a device this past summer. I don't need super detailed images, but I just want to be able to look at my prop and rudder to see if I have lines fouled. Being basically cheap, I have put together the following items:
A 10 meter cable with a USB camera on the end. I figure that I can use this for other jobs as well. IP67 rated which means that it is OK for water depths of 1 meter for less than 15 minutes. It has LEDs on the end but they are too weak for underwater use.
www.amazon.com/gp/product/B01236UQS4 About $20
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I added an underwater LED flashlight for $11
www.amazon.com/gp/product/B011R8NPPA
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And a couple of inexpensive rechargeable batteries and charger $5.50
www.ebay.com/itm/201429609195
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Now I haven't used this stuff under water yet but I will try it out next season.
We did have a friend on our boat with an inexpensive GoPro clone last season. He stuck it under the water on his selfie stick while we were sailing and we could see the whole bottom of the boat in the playback, but the water was quite clear (Bahamas).
I would like to put something together myself and if your camera would work I'll go that way.
Bob