Geez, I thought that Australian "175m" was metric...
it's a metric conversion of imperial 600 ft in the wake of harmonization between FAA and EASA. Same story goes with US specs. In imperial system, RVR for CAT III A is 600 ft. Now imagine a Italian dude shooting an approach in MEL and given RVR 600 ft whereas his OM A says CAT III A RVR should be 200 M. I'd give a beer to see that face. Which one is to be applied here?
