It really is about time that 100% breath-testing of all crew should be done prior to each flight, much the same as the use of metal detectors are commonplace. It is only if you actually know your reading, that you will be able to control your drinking, it would cut out all the guesswork.
I should be Ok as I have only had a half-pint of lager in 2018 so far, and class myself as a non drinker.
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