Plotting Course


While on “third watch” on the bridge, Barcalow brings Ibanez a cup of coffee and they hang out a bit. Looking at the screen, he notes that “something’s wrong.” He reaches down and presses a button, and a screen appears with the label PLOTTING COURSE. A small yellow circle zeroes in on their spot in space, labeled in green as CURRENT POSITION (with “galactic” XYZ coordinates listed beneath). Then a yellow circle zeroes in on their destination, labeled in blue as TARGET DESTINATION. (With fuigetry from her earlier interfaces lining the top and bottom.) Each dot becomes two squares that slide into place on a side-by-side comparison screen with an efficiency analysis below.

Ibanez explains that she replotted the course, it being “more efficient this way.” To check it he walks to a different computer, which we’ll discuss in the next post. Even though this little interaction takes place over a few seconds, already there are things that need to be discussed before we move on.


Why wasn’t he notified?

Barcalow only finds out about the change to the course by coming to the bridge and observing something on a screen there. Any system that knows its user (and recall that Ibanez had to log in to her station) should know and respect the authority chain of its users. With only three weeks of experience at the helm, it seems more likely that Ibanez should have had to submit a plan for consideration rather than being able to just grabbing the wheel while everyone else is asleep. Seems like a hijacking waiting to happen. More sensibly, Barcalow should have come onto the bridge with the coffee saying, “I saw you submitted a new course. That’s a pretty bold move, ensign. Want to show it to me over a cup of this here space jo?” Then we’d get the idea that there’s an actual chain of authority in this military.

Even if Ibanez has the authority to alter the course without approval, her superior officer (at least) should be notified of the change immediately, so he could be aware and check up on it if he needed to.

Why is this information on a tiny screen?

Everyone on the bridge should be aware of the same basic bits of information. It’s one of the main reasons you get people clustered together in a bridge or a mission control center in the first place. Shouldn’t this be some of that basic information? If so, why is it only appearing on a tiny screen that Barcalow happens to glance at because he’s trying to woo Ibanez? Do they always have to hire womanizing superior officers? Better is a shared information source like Star Trek’s viewscreens where some glanceable mission information—like progress against course—can be seen by everyone.


Cartesian coordinate system

I do want to credit the interface designer for including 3D coordinates. Sci-fi can fall into the trap of treating spaceships as if they were seagoing vessels floating on a 2 dimensional surface like the sea. Props for acknowledging that the ship is moving through three dimensions. And Cartesian coordinates are nice in that anyone who has completed remedial geometry will be familiar with Descartes’ coordinate system. (Though I doubt that Cartesian Coordinates would be the actal system being used in space. It’s much more likely to be something like the International Celestial Reference System or even sweet-looking Keplerian graphs.) But narratively, showing 3D coordinates is a step in the right direction. But we can do René one better for both the audience and the navigators.

Show don’t tell

Other interfaces on the bridge already showed us that the system is capable of displaying 3D information. On this screen, it would be better to show the plotted course and the point at which the ship is along it.

Of course space travel is likely to be incredibly boring with long stretches of straight-line travel through vast swaths of emptiness. But this is sci-fi, so let’s presume that its path includes gravity assist fly-bys of stars. That gives the display useful markers for orientation and something for Barcalow to look at to realize how the course has changed. Then when he needs to compare, he presses the left arrow key and can see the old path overlaid in a new color in the display, letting him (and us the audience) see the change in course rather than be told about it. Numbers can overlay this display to provide exact details, but it would augment the immediate understanding offered by the 3D.

One thought on “Plotting Course

  1. Pingback: Report Card: Starship Troopers | Sci-fi interfaces

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