We will have access to radios during the event. I won't go through the minutae of voice procedure, etc, here but, I will make some small points.
Each patrol with a radio will be assigned a callsign on the day. When talking to other patrols, only refer to them by their callsign.
We will also use some basic codewords, which, again, will be assigned on the day. They will refer to phrases like "at objective", "enemy sighted", etc.
Because of the nature of the terrain, we may need to use each other to relay messages to someone else. This is a fairly simple procedure, which I'll give an example of....
"Hello Fox, this is Baker, over"
(No response)
"Hello Baker, this is Dog, relay through me, over"
"Dog this is Baker <message text>"
"Baker, roger, out to you, Hello Fox, this is Dog, over"
"Fox, send over"
"Dog, from Baker, <message text>"
"Fox, roger out"
"Baker, this is Dog, message passed, over"
"Baker, roger, out".
When I want your opinion - I'll tell you what it is!
Brill, thanks Pete! 
Yeah, biggest thing that winds me up with radio comms is 'over' and 'out'
'Over' meaning -> Over to you, I have finished what I am saying and I am wanting for response
'Out' meaning -> I have finsihed what I am saying, I expect no reply.
Do you think a received and understood message is required, in case for some reason the message is miss heard/miss understood?
Affirmative — Yes
Negative — No
Reading you Five — I understand what you say 5x5. Can also be "Loud and clear"
Over — I have finished talking and I am listening for your reply. Short for "Over to you."
Out or Clear — I have finished talking to you and do not expect a reply.
Roger — Information received.
Copy — I understand what you just said (after receiving information).
Wilco — Will comply (after receiving new directions). Implies "roger".
Go ahead or Send your traffic — Send your transmission.
Say again — Please repeat your last message (Repeat is not used as it is a specific command when calling for artillery fire)
Standby or Wait one — Pause for the next transmission. This usually entails staying off the air until the operator returns after a short wait.
Wait out - Don't hang by the radio for a reply, but expect one in the future
Don't complicate things guys! Stick to "over" and "out" and the occassional "wait out" or "out to you", for the end of transmissions please. That way, everyone knows the score. Only take on the role of radio operator if you are confident to use the bloody thing. Don't clog the airwaves with loads of "er's" and "erms". Think before you speak!
When I want your opinion - I'll tell you what it is!
