Hi all - a rich thread, this one. I was ATSA at JATCRU Bishops Court (Ulster Rad) for 18 months - '68 to '69. We used chinagraph on clear perspex strips which were moved across a large vertical, edge-lit board, between 2 pairs of consoles. Our 'D' men were in Prestwick. We ATSAs were on RTF and updated the strips using red and yellow chinagraph - IIRC red was for eastbounds. A busy day yielded sticky orange hands which were a bu..er to clean; we had to wipe the perspex clean and reuse them. I believe we too had an Electrowriter and phones for data from ScACC Redbrae. We used big Type 80 radar to cover some of the Irish Sea and oceanic stuff up to around Benbecula, all upper air tfc. I've been around a bit since then - am just about to finish at ScACC !