More damage to enemies
When you press attack hold the (A) button while holding it press (B). Do that 3 Times and you'll get more damage. It worked for me but if it doesn't work for you please don't complain.
Various Gameplay Tips
Use lighter, faster ships to scout ahead and see what lies in wait. foreknowledge is half the battle, and every one that. Long-ranged guns should stay stationary to fireside, thus get into a well-defended position and keep there till you've got drained the enemy. The quantity of harm you deal is directly associated with the well-being of your craft, thus for the large hitters it is best to stay a repair ship near to stay it in tip-top condition.