To see what I'm talking about take a look at the Dinard ADIDI VOR DME 17 procedure
You can't look at that IAF in isolation though. Look at the arrivals. The standard STAR from the north is (JSY) MINQI DIN, but "sur instruction" you
follow the 190 radial from JSY to DIRGO, then track 178 (DIN 358 radial) to ADIDI whence you commence the approach. With conventional nav kit, that is the only circumstance in which you should be using ADIDI as the IAF.