approach construction
I think ICAO specifies a 50 knot adverse wind assumption for airspace clearance criteria when designing an approach. And there must be a final approach fix, derived by timing for each class of aircraft, or else an approach speed must be specified with timing. Specifying a distance (18 miles....!) without information on how to get to that distance seems an odd procedure, especially as the designer seems to have taken care to omit ANY timing information.
The pilot could calculate that based on his ground speed, but so could the procedure designing agency. Is this a Jeppessen approach plate.?