• Don't blindly lay maximum-size minefields. A well-done carpet of smaller ones takes more time to sweep.
  • Overlapping mines increase the hit odds.
  • You cannot lay a new minefield when you are inside one of yours. But you can lay small minefields first and increase them later using Lay Mines In.
  • If you're Crystal, also lay some normal mines for a change.
  • Minefields are good for splitting approaching enemy fleets apart.
  • You can transfer torpedoes between distant ships by having one ship lay a minefield and another one scoop them up. You can even convert torpedoes between different types this way.
  • When sweeping minefields, keep in mind that minefields shrink a bit (decay) before you can sweep.