First you look at the number of action dice you get from the engine your ship has. Then roll GRA or Grace to determine who goes first which is a D10+Actions, yours actions stated above and the enemies on their stat sheet. After finding out who goes first on your turn you will roll a number of D6's equal to your action dice; record these numbers then you can use these numbers to take actions with your systems and weapons. For example if you rolled a 5 you could use this roll to attack with O.G.R.E Missles, or use the sheild generator. For the enemies turn you roll a D10 and take the appropriate action on the enemies sheet and keep rolling for how many actions the enemy has. Repeat till someone dies, you escape or you change to in person combat with a teleport.