I once, many years ago now, was flying in a small moa south east of phx on my way from turf to Wilcox. No transponder, no flarm no nothing, watching two A-10s flying and dog fighting looping and rolling ect getting closer and closer and called 66 on the radio asking how to let them know I am here. His answer surprised me but has stuck with me ever since. " Call Alburqurque ctr on 121.5 they can contact them" And although they (alb ctr) didn't ack my transmission within about 30 seconds they A10s disengaged and formed up and flew away toward Davis monthan afb. If I forgot to say thanks Kirk I just did now!

CH