Here’s a quick guide to Walkie-Talkie Talking:
John for Larry, over. – “I’m John and I want to talk to Larry”
Go for Larry. – “I’m Larry and I’m listening for your message”
What’s your 20? – “Where the hell are you?”
10-20 at craft service. – “I’m currently at the craft service table”
Roger that. – “Ok I understand what you said”