Hi All
I was on the same flight as Peter, (Exfirepro, above) and a little ahead of him and had the same ADSB return on my screen. His/her position on the moving map indicated that he/she was just off the coast and I was just inland, as should be the case, but as we approached head on the images of our aircraft seemed to be extremely close and as Peter says I moved a little further left and had my eyes on stalks looking for him/her. I am aware that the zoom level of the map will have a great effect on the apparent horizontal separation and was satisfied we both had space but unlike Peter, I'm still looking for him/her as I never saw the aircraft pass me, and as someone said above, my eyesight aint bad either.
Without PAW I would not have known there was another aircraft anywhere near me and on this occasion we would both have gone blissfully on our way, or maybe not if I hadn't moved left!!
A similar incident a few days earlier with another club member using one of our spare PAWs was flying in close'ish proximity and none of us eyeballed each other.
If anything, these incident help to prove how difficult it is to see a small moving target from the cockpit even when you know were to look so spotting an opposing small aircraft unaided, in time to react, is always going to be largely down to luck.
Alan