You mean I would find something at the posted coordinates that says "50m east"? Yeah, that's a multicache. While it is important to keep in mind the "use of GPSr" rule, hiding something at the posted coordinates covers that. After that, getting to the next stage can involve any method you like, as far as I know.On the other hand, if you're saying that the cache description is what tells me to go 50m east, then it would more likely be a letterbox hybrid (or an unknown if you don't want to put a stamp in it). And, in that case, the "must use GPSr" rule becomes dicey, so the details need to be handled carefully to insure the GPSr really is required.
My intention was to use GPS co-ordinates to get you to the first find, this would then direct you to the second stage by some other means, as described, and this would then direct you to the final location (with the log) again by some other means.
So you would only need a GPS to get to the first stage.
This seems to meet the GPS use requirement.