Types text to the global radio channel. The text will be visible only on the PC where command was executed. If you need the message to show on all computers, you have to execute it globally (see remoteExec). Use clearRadio to clear chat history
In OFP 1.96, this command can be used by a Game_Logic unit, which will result in the text being displayed on screen without any indication of the side of radio source, or quotation marks. For example : gamelogic1 globalchat "hello world" will create the text hello world in the radio log.