Nav Canada pays double time for overtime, which is either paid out or can be "banked" as such, and taken as TOIL (8 hour overtime = 16 hours TOIL). Minimum O/T shift 4 hours, maximum 12 hours. Some people bank all their O/T and take it as one huge lump sum payout at the end of the financial year (or is it 6 months now? Can't remember, I don't bank mine). Best paycheck I have seen was in the $20k's
Unfortunately, to obtain TOIL there has to be be staff available or spares on for that day.......