Dear all, 

I could figure out the following: what is the difference between "full old approach" and "Star approach"?

Not 100% sure what you're asking, as neither of those terms are standard phraseology, but here's an explanation of some of the basics:

 

STAR: Standard Terminal Arrival Route

This is a sequence of waypoints, often with associated speed and altitude restrictions, which define a transition route from the enroute (cruise) portion of a flight to the arrival (terminal area) portion.

Some STARs allow for their final waypoint to be connected to the initial waypoint of an instrument approach (Closed STAR).

Other STARs end with a heading to fly after their final waypoint, requiring radar vectors to the final approach course. (Open STAR)

 

Full Procedure Instrument Approach

This is an instrument approach procedure which begins at a navigation beacon, or Radial/DME fix and allows the aircraft to navigate to the final approach course using a course-reversal manoeuvre (or DME Arc) and does not require radar vectors from ATC. Many ground-station based instrument approaches allow for the full procedure to be flown, or for radar vectors to be provided to the final approach course (if radar is available)

 

I think a "full old approach" might be referring to the Full Procedure Instrument approach, which was more common in the past when radar coverage was less extensive. (FYI - they are still used in remote areas with limited radar coverage)

A "star approach" might be referring to the use of a Closed STAR for initial route guidance into the terminal area, then a direct connection to the Initial approach fix of an instrument approach. 

 

Neither of the above would require radar vectors.

 

Hope this helps.