So, before you can use it, you have to do a little quest for them. Bad news is, they are screwed and are waiting for supply ship for the last 8 years. Good news is, there's one just waiting for you in orbit around the third planet (which you should recognise as Earth, only it would be red when you get close). At the start of the game, you have none of them (RU's that is) but that is not much of a problem because you don't have a base in which to do all those wonderful things mentioned above either. Resource Units(RU) are used to buy ship modules, fuel, crew and to build your armada of smaller ships.
