Last Friday, I was on F/ON-005, and had a S2S QSO with GW3TJE/P. Peter was on Black Mountain, GW/SW-041. Looking in GW ARM for his grid square, I find “SO 255350” which is a British National Grid Ref (I presume). It seems that this system may extend to Atlantic Ocean and Europe, but I think It would be better for ham community to all use the same coordinate system i.e. grid square locator. If not, please give us latitude and longitude positions in ARM so we will be able to calculate distance between two stations.
Another SOTA rule to improve ???