Avionika thanks for that. Ozzies tend to get a little carried away at times quoting figures etc. From my experience in the a/c and by LISTENING to engineers who know alot more than me, I have come to the conclusion that the tanks are empty when the guage say empty.
If this was not the case, we would have to make the appropriate allowance when doing load sheet calcuations. If the fuel guages say we have seven tons, we have seven tons. Thats what goes on the load sheet and I suspect there would be hell to pay if this was not the case, in the unlikely event of an investigation into a incident/accident.
When the guage says zero, it means zero!!! Empty, nada, nil!!!!!!!