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9, 7, Oscar, Echo, Zulu, and 7, O, G, Z, finished Jack, South Yorkshire, UK, back to you. Alright, I got you that time, thanks for joining us. Tom, back to you. Okay, QSL, Ken, thanks for that, and thanks for that station in South Yorkshire for joining in. Okay, so we're talking about a trunk to radio system, and why does the system emerge, and how does it juggle all this traffic? Because the fleet net system, as I mentioned, it spans a huge geographic area, a ton of different services and agencies sitting on it, and different modes, analog, digital, clear, digital, encrypted. So how does all this work, and why do they need to do it? Well, there's a couple basic concepts.