mine

In your experience, what are some unique issues of mine diving? Do you have any lessons learned? Here’s something to start that I picked up along the way but looking for less obvious problems. Dry section: Don’t touch the ceiling, stay away from walls, especially bulging stacked deads Access...

I bought sj4000 and i tested it in old mine and in small lake in Finland. I think the video quality is good, although the camera is cheap. this is an old mining and here is a small lake