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According to what I read in the story, and the prompt, they likely think the pods "power" the guns, or dispose of any debris the guns produce maybe? I mean in the story, they know the pods are there. Maybe may not notice a pod leaving on occasion? Unless they think the pods are going off for "free maintenance"?

That was the same conclusion I drew (about the pods "powering" the guns or disposing of whatever), I was just mildly puzzled that they don't notice the pods leaving and then wondering if the pods came back after making a delivery or if they were replaced by other pods, but I don't know how much attention they pay to space just because they are capable of going to space so who knows? XD

"Oh, that's part of the maintenance cycle. A pod will pop off to the station for a technician over the least little thing. Beta test. You understand."

I guess they're not going to care as long as it gets replaced so their "disintegrators" continue functioning XD