Okay, so, here we're going to enter a formal conflict.
A straight shoot-em-up is possible. It is
not the only way through this situation.
Combat (or pretty much any conflict) in Fate core works best when you--the players--take the time to plan things a little and set-up situational advantages using the
Create Advantage action to, well, create advantages that you can invoke when needed.
You're at the airlock to the flight-deck. There is a door to the control room that is also a dual-pressure door, but not with the airlock cycling that direct access to the flight-deck requires. The marines are likely in control of the control room.
You now have access to the arrmoy (if you can get in).
Absolutely
everything else is open to discussion. Feel free to make shit up! But keep the spirit of the drama of the situation. If it's way too much out there and in your favor, I may veto it, but more likely, I'll ask you to roll for it...
You can also spend fate-points to bring things into existence without rolling.
Once you guys are on-board the Orishi and off the station, we'll call it a milestone and refresh your fate-points. This first opening scenario is really just to get our feet wet, so to speak.
So, here's what I'm envisioning: