Invalid Activation W4C/EM-085 Pilot Mountain

[G4AZS]

There is also a discussioin on using GPS devices for checking elevation here:

GPS height accuracy?

Hi all, I carry a basic Garmin ETREX 10, it doesnt include any maps, but gives me an accurate grid ref in poor visibility. (I have also downloaded a track from SotaMaps, just to prove that I could, which worked very well)! Anyway, on Black Mountain GW/SW041 a couple of days ago, I walked past the trig point at Hay Bluff, and onwards along the ridge until I was somewhere near the spot height of 703 metres shown on the map. Stupidly, I didn’t think to check the GR on the GPS, but I did notice, w…