When I took a 30's aeroplane through the M east in the 80's I had a 1,000,000 chart, but it was rather scant on detail** plus dubious updates which was evident during the transit Syria to the Gulf States.
One particular leg required following an oi pipeline (to be sure) and there were two duly depicted., however on reaching said area the two pipelines popped up as expected (amazing) followed by a third which begged the question which was the new one as they all looked the same and were partially buried in the sand UMM.
At times like that I would have rather been on a Croydon to Paris commemorative event. We were lavishly equipped with the good old P8 built in the east end of London.
** No military airbases and old forts.