A crude symbol depiction (without history trails) for illustration. Two fictitious aircraft.
1. HEL – VH-
COK
2. BE20 – VH-
AMB
Let's say for arguments sake, the screen range in each case below is 40nm (about right for most Approach functions)
Below, Raw radar (blobs), beacon control slash's (
************) not touching = Target Res’
............. COK ............ ......AMB
....... ......./
............... ........./
. ****[####]**** ****[####]****
. .... .......[
.. . --- 3nm ---
.. . ]
Below, same 'actual' distance apart, Synthetic Radar (modern) 3nm Separation.
......... .... COK.......... ....... AMB
............... /
............ . ........ /
............ (+)............ ...... (+)
Below, how Target Res’ (not touching) would look if used with Synthetic display
........ .... COK AMB
........ ...... /
... /
............ (+) (+)
............. [ -- ] = 4/5ths of nothing between (actual aircraft positions) on an Approach RADAR scale screen
Disk, DO YOU SEE THE DIFFERENCE?, and why it would be a safety PROBLEM!!!!!!!
.... love yer work
Creamie 
