Airway width/wx deviation

[Slo Moe]

Procedural APP and ACC

BTW the term I used "procedural approach" can also be "procedural ACC".
(Area Control Centre)

Those facilities usually do not say "radar contact", they base their separations
(The minumum distance that the aircraft are kept from each other, in plain
language)
on certain procedures. (The word procedure does not refer to the
checklists etc.)
The procedures are methods that are based on using the navigational
instruments or such (VOR, VOR/DME, ADF, altimeter, time etc.) and the
reports that pilots give. (Report passing 10 miles DME, report passing four
thousand feet etc)

They are just those clearances that are quite a task to write down...

Oceanic conrol has been based quite much on procedural separations.
That's almost all that I know about that subject.