I think one of the factors at Tenerife was the ATC-clearance "After Take-Off continue on RWY heading....."
Anyway: ICAO-rules state that:
"the word "Take-Off" is only used when an aircraft is cleared for take-off, or when cancelling a take-off clearance. At other times the word "Departure" or "Airborne" is used."
DOC 9432 "Manual of Radiotelephony" 2.8.3.3
But many countries deviate from ICAO-standards.
Thanks for the link JEP.
GEN - 1.0 GENERAL INFORMATION - TC AIM – GEN – GENERAL - TP 14371 - Aviation Safety Letter - Publications & Videos - National Operations - Aviation Safety - Air Transportation - Transport Canada
Section 1.3 of the link above shows Canadian Differences with ICAO Standards, Recommended Practices and Procedures. Nothing is indicated for radiotelephony.
My understanding of that section you quoted means that the controller is never to say the word takeoff to an aircraft until that aircraft is being cleared for takeoff.
If I call the tower and say "ready for takeoff", how is that going to lead me to misunderstand the next ATC statement to me, leading to me rolling without a clearance?
As for Tenerife, the controller in Tenerife did say "standby for takeoff, I will call you" and if I remember correctly, due to radio squealing, all that was heard by KLM was "Standby-sqealing......". So even there at Tenerife, the use of the word takeoff by ATC did not lead to the accident. I do agree that ATC should not use the term until the takeoff clearnce is given.