I have a special interest in sci-fi doors, so, for completeness in the database, I’m going to document what’s we see with the security doors of the Rodger Young, which is not much.
To access the bridge, Carmen walks through a short corridor, with large, plate-metal doors at either end. As she approaches each, they slide up over the course of about a second, making a grinding sound as they rise, and a heavy puff of air when they are safely locked open. (If they’re automatic, why don’t they close behind her?) The lower half-meter of each door is emblazoned with safety stripes.
Carmen appears to do nothing special to authenticate with the doors. That either means that there is no authentication, or that it’s a sophisticated passive authentication that works as she approaches. I suggested just such a passive authentication for the Prometheus escape pod. The main difference in what I recommended there and what we see here is that both Carmen and the audience could use some sort of feedback that this is happening. A simple glowing point with projection rays towards her eyes or something, and even a soft beep upon confirmation.
The only other time we see the door in action is after Carmen’s newly plotted course "discovers" the asteroid en route to Earth. It’s a Code Red situation, and the door doesn’t seem to behave any differently, even admitting about half a dozen people in at a time, so we have to presume that this is one those "dumb" doors.
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I have other problems with the design of the Rodger Young. It’s a space boat, not a spaceship. And it’s a badly designed space boat. Putting the ship’s bridge on the outside, (with Windows!), is just asking to have it shot off. I don’t remember if they had shields or not, but that’s not the point, it’s a bad design.
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