I cannot see how recceing a route, whether alone or with someone with local knowledge, can be compared to using a Global Positioning System to navigate that route in the heat of a race whatever the conditions.

There are plenty of devices around that record information during an activity that can be downloaded later but do not assist in the navigation of the route.

Anyone who enters a race which states that Navigational Skills are required should have those skills and if they have not or cannot be bothered to learn them there are plenty of fully marked trail races about.