So... If each captor mine had only one submunition, and you lay a field of 20 mines, each powerful enough to destroy one small ship, and 20 such ships enter the trigger radius of the mines... They are all destroyed one tick later, assuming all missiles hit? Do the mines have to be laid in separate salvos? Or are submunitions from one mine a new, separate salvo even if a whole bunch of mines that are themselves in one salvo have triggered at once?
I should know this one, because I've had captor mines trigger on my survey ships before. Sneaky precursors are sneaky.