Just wanted to add that even though Reach receivers handle the WGS84 coordinate system only, they can provide the coordinates in the base’s coordinate system. If the base’s position is specified in another coordinate system, the Reach’s coordinate in the Survey tool and in the position log will be shown in the base’s system as well, despite the fact that the ReachView specifies it as WGS84.
Let me also link this post by Tatiana that might clear things a bit:
