One for the air Defenders on here. Does anyone know what the Cluttergraph, used in Air Defence (well Anti-Aircraft I suppose)
just after WW2 was? Any information would be great.

OP_Ack - I think it is like the dead ground trace an M-STAR produces. AD unit sets up and needs to know arcs etc. Early days of radar, maybe they produced that to know if aircraft could sneak by at low level, thereby needing another unti to cover that area.

Until a trained Air Defender replies, I'd go for that.