Sea Mines - Has anyone used them yet?

[5./JG27.Farber]

My Grandfather was on converted trawler minesweeper during WWII. They used to use a cutter cable to surface the mines then use an enfield to shoot at the detonator spikes to blow them up. It used to take forever he said. Later they got a deckgun and they would penetrate the mine and it would usually sink rather than explode.