"Beyond Naval Mines" Topic

… it may be helpful to provide some amplifying information, explaining how offensive mine warfare is beginning to transform into multidomain offensive and defensive capabilities from the seabed.

These new asymmetric warfighting capabilities build a more lethal force using advanced autonomous systems. Instead of minefields—comprised of some number of individual mines, however "smart" or "dumb"—new concepts now call for prepositioned undersea canisters with flexible, encapsulated payloads (unmanned aerial and underwater vehicles, missiles, torpedoes, etc.) as part of a distributed "kill web" providing scalable effects from the seabed. Such a persistent system of disposable payloads can be delivered by either clandestine or overt vessels and vehicles of opportunity…

link

UAVs from underwater are a bit complex. Lockheed had to literally fill the entire hull of their Cormorant prototype with expanding hard foam to keep the titanium hull from getting crushed by sea pressure.

And the Cormorant was only launched from ~100 feet down!