Ah TJW, does ‘quite interested’ stretch to reading Allied Communications Publications (ACP)? Try the instructions on Beadwindow that covers disclosure of Essential Elements of Friendly Information (EEFI) in Radio Telephone Procedures at para 803 in ACP 125(F) (dated Sep 01):
http://www.jcs.mil/j6/cceb/acps/acp125f.pdf
As for dropping my foot in it within the aircraft, oldpinger also offers a useful lesson in rotary crew co-operation: upset your crewman and he/she may not tell the front seats when a senior plugs in his own headset.