Afternoon, MPN11!
The dosimeter tags!! Our SATCO was banned from going anywhere near the radar for a while as he had been keeping the tag in his drawer next to a luminous alarm clock!! Much hilarity!!
You are correct re: the GCA IMC question ... the answer (of which I can't remember the exact details) was printed on the inside of the front cover of the En-Route Supplement! Really sneaky that one!
On one occasion we were instructed to evacuate the truck (fortunately the wx was BLU) as there was diesel fuel lapping over the door sill of the power trailer! The reflection of the arcing in the inverter/rectifier?? off the fuel was quite impressive!