This is pasted from the small folder I always have stuffed down the side of my seat:
Some countries adopt the US standards for approaches (TERPS) rather than PANS-OPS and some use a mix (there is an airfield in Germany that uses TERPS - check the lower left corner of the Jepp plate for the designation used in the procedure. Radius from theshold for Cat B/C are 1.5nm/1.7nm (TERPS) and 2.7nm/4.2nm (PANS-OPS). The primary difference for us is circling MDA & radii of OCA. For us, always add 100' to the circling MDA. If you need to fly outside TERPS radii then be aware of all obstacles within intended circling area and maintain 5km+ vis & ceiling of MDA+1000'