Board Thread:Off Topic/@comment-24993958-20160225194034/@comment-26397825-20160316112614

They had short wave radios before they had the CCT, and there's probably enough towers around that they could still use short wave communications. They just wouldn't be able to contact the other kingdoms is all. The WoR video that talked about it used Patch and Vale as an example when they were talking about short wave radio communications, which isn't the smallest distance between the landmasses. So there'd probably be enough short wave towers still hanging around that they could keep track of each other as long as they're in town itself and within say a twenty block radius of each other, but anything over that would be pushing it.

I'm not sure how far away Mountain Glenn was, but it was completely destroyed and had no radio towers left standing for Ruby to get signal off in that episode, though she had enough to initiate the call even if it dropped it pretty quickly. Vale is still mostly standing, and the other Kingdoms would arguably be in a much better situation.

Though I do agree that the GPS systems seem a bit odd when you do stop to think about it as there's no satellite to use for tracking, and they'd have to rely on the CCT and radio towers to function, which when you go outside the defenses would be few and far between.