And another question about lessons supposedly learned from the Tenerife accident:
One of the first things we were told in class, as students, by the controllers was that the word "take-off" is to be exclusively used in the phrase "cleared for take-off" so as to minimize the risk of such a thing ever occuring again. In any other case the word "departure" had to be employed (most importantly: "ready for departure"), and we were assured that this rule is being strictly adhered to all over the globe.
While my subsequent flying experience showed me this terminology to be indeed diligently observed in Europe, I was surprised - while doing some hours in southern Africa - to hear a lot of pilots actually say "ready for take-off"!
Isn't this phraseology mandatory everywhere?