Underwater rock blasting - GIF

Underwater rock blasting.

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Previously:

https://www.homemadetools.net/forum/...363#post154504
https://www.homemadetools.net/forum/...788#post229400
https://www.homemadetools.net/forum/...937#post156710
https://www.homemadetools.net/forum/...012#post217596
https://www.homemadetools.net/forum/...922#post206871

Probably preparing to dredge the channel to deepen it. A cutter head dredge could do the job as long as it wasn't bedrock but would be slower than drilling bore holes and have divers place charges.

I wonder if anyone goes around collecting the fish that float up after that?