Thus it is possible that the circling area in which obstacles have to be considered is different for the VOR and the ILS.
But as the circling area is defined as distances from the airfield (a sort of convex hull around radii projected from the respective thresholds), either you're inside the area or not...
The charts show the same circling limitations (066-->264deg) for all approaches.
At GCTS, the ILS & VOR approaches are both aligned with the runway and at a MDA of 1,350' on 08 you're only about 2.5nm outbound from the VOR - 5deg track error is c.0.2nm laterally at this range. As pointed out, the dates on the charts range from 2001-->2008...
For those who are heroic enough to be able to circle at 200 knots, or thereabouts, within 1.7 NM, I say more power to your elbow!
Quite. 200kts, 30deg AOB gives a turn diameter of > 2 miles, so staying within 1.7 to land on, say, a reciprocal runway would be interesting manoeuvre, to say the least...
My airline still authorises circling approaches but fairly recently raised the minima to at least 1,000'AAL. We do train for this type of approach but to be frank, most sims are crap in this regard as you don't have a proper visual reference for a lot of the "visual" segment so are reduced to watching the map - not exactly good practice.
It does cross my mind that the most likely time (for us) to have to do one of these approaches would be into some hick airfield on an ETOPS diversion in the middle of winter. Personally it would have to be one hell of a cross/tail wind to persuade me not to use the instrument runway! BGSF comes to mind here...