So, explain the red diamonds...
Low Flying Avoidance symbol for industrial sites or nature reserves.
During our low flying training on the G-nat, we all dutifully avoided some LFA avoidance, which was a mink farm in Viet Taff land. However, the druid who owned the place kept ringing up and complaining angrily.
Eventually someone decided to check. Yes, it had been mis-plotted on the official LFC..... So by carefully trying to avoid it, we'd actually been wiring the place - which apparently causes the nasty little $ods to kill each other during their $hagging season...