Scuba diving is expensive and also there are dangers of doing it (human factor) but these kind of products can reduce all these costs and under water surveys can be done more efficently by this way. As someone did surveys under water in the past, I know how time, energy could be saved by using this product for sure. Great Hunt!
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Yes, the risks that run a team of people when using a submarine are high.
This is a good way to avoid problems.