Nope..its never helped my SA (although if it ever existed in the first place..my one brain cell would probably get lonely
) and it usually makes me smirk..kind of a "I say heavy cos mines bigger than yours"..pointless requirement IMHO...keeps someone in CASA in a job though I suppose..
I think this requirement harks back to the days of primary radar..with little or no flight data info..hence the "heavy" to help with separation inside the terminal area..or at least I think I remember reading that somewhere.