very sad, RIP and condolences to family and friends. four aviators with blue skies and tailwinds forever...
it is just SO hard to see other aircraft in the air - I heard a call when inbound to Boonah that meant another aircraft and my Drifter were going to be at the same place at the same time in about one minute - I never saw that aircraft (after 10 seconds of scanning the area where he said he was) so I did a descending 180 to make sure I was clear. problem is, the turn I made could have put me into conflict and I would have missed a collision if I had just kept flying straight and level - you never really know...after the turn I was 1,000 feet lower than the other pilots' 'transmitted' altitude and heading away from his 'transmitted' position - but...I've heard pilots say they were at 2,000 and they were at 2,500 and descending - no good to me if I'm at 2,500 and I think we're clear of each other - he should have called "passing through 2,500"
I was taught a scanning method when I was in Army Aviation and it is quite good, but there are so many angles and height differentials, it's always difficult, particularly if the other aircraft has no 'movement' against the background, i.e. it is moving directly toward or away from you. at least with the Drifter I have just about the best view of the sky there is...it's a big sky, but on a regular basis we should be saying out loud "OK, who's up here with me" and doing a proper scan.
BP
PS....I've recently fitted a strobe to the top of my kingpost and a VERY bright wide angle led 'landing' light under the pod