Sorry topic drift,
I am thinking SE Asia during the burn off season which is unique.
Smoke haze for a month.
Visibility 300 meters most of the day.
(unlikely in Perth but it is a possibility with the summer approaching.)
Some airlines cleared for approach by the tower,
fly the ILS when tower report 300 meters in smoke haze.
We were instructed by our company to enter the hold and wait for tower ATC report the ILS minimum 800 meters visibility.
Sometimes that happened before TTD ( diversion time) sometimes no.
This can become a high stress cockpit,
see crash report
https://en.wikipedia.org/wiki/Garuda...sia_Flight_152