Power
Every ship has a certain ammount of power at its disposal each turn. This power is used by most of the ships systems. Ships have 1000 units of power available each turn (multiplied by hull size). So a ship with a Hull Size of 1 has 1000 power, one of Hull Size 5 has 5000. The race shipyards now indicate the ammount of available power each ship has.
Each system has a set ammount of power it uses. If this power is unavailable, the system wont be able to function. Some systems drain power constantly, others only drain power when used. For example, Phasers and Disruptors only use power when they are being fired.
To see the power used by each system, click here.