Testing the camera to see if its waterproof in a bowl is one thing, but testing at depth is quite another. This camera was designed with ROV competitions in mind, so survival at 300ft isn't a consideration. But it must survive at 10ft and that needs testing.

I don't have access to a swimming pool, and getting one installed at the house seemed like an expensive option. Instead I built the smallest 10ft swimming pool ever - a piece of 3" diameter, 10 foot long, PVC pipe. I epoxied a piece of left-over acrylic pipe to one end (so I could see what I'd lowered into it), and then added an endcap. Once dried, I stood the tube upright against the side of my house and filled it with water.

I attached a couple of weights to the camera and lowered it into the tube. A quick test using the same setup as before, and it still works. Now I'll leave it there, testing periodically, to see if it fails.