Communication in a MK3
Clunk Coff My first ever interface with a Mk3 com system was playing on Kenley Common as a 11 year old and hearing the Cadets being 'pattered' around the base leg/final turn.
It took a while to realise where the voices were coming from, but they were very clear. Of course the 'com' was only one way.
Wonderful system that never failed.