Our last inspector (who used to teach HF) gave us this one:
Height (ft) Seated Moderate Activity
20 000' 30 mins 5 mins
30 000' 1-2 mins
35 000' 30-90 secs
40 000' 15-20 secs
he said it was valid for the questions on the old syllabus, and probably the new one.
phil
Last edited by paco; 10th July 2012 at 17:31.