[Tallguy]

... but what the Iranians are training to do this time is to perform “swarm attacks” using high-speed boats supported by heavier units. They will hit the convoys while they are picking their way through the minefields, making systematic minesweeping difficult.

[Lou L]

... but what the Iranians are training to do this time is to perform “swarm attacks” using high-speed boats supported by heavier units.

Again, that's been the prevailing thought before this current situation. I think most of our Navy would call such swarm attacks "target practice."