What has been prohibited? Use for navigating or wearing to record? - I always wear and turn on my GPS, but do not use it for route finding - in fact it will not store a route except "live" in the take me back the way I have come sense, and it will point at a stored location "as the crow flies". It can be used as a compass, but it is more fuss than an actual compass.

Unfortunately people may cheat - and when the clag is down it will make a huge difference - as will having been shown the route to the inch by an expert. Is this going to be prohibited as well?