The ships don't have the technology to be computer linked, but they can be combined to be flown as one big ship.  And yes, it's because the pilot on the other ship isn't nearly as good as Sarah, and they could use important members of the Rogue Trader retinue to work on both ships at once rather than only on the flagship.<br/><br/>Later on, I'll allow the ships to be able to be fully linked wirelessly, but for now, they need to be physically plugged in together to be piloted by the bridge crew.  (the reason for this is because I want to restrict using the ships in a squadron slightly in the early stages of the game)