However I would like to say that indeed 1.6 Promille for anyone would be almost unbelievable as I think she would not even be able to walk
It's actually just twice the drink-drive limit. So walking would be no problem.
Not in Germany; 1.6 would actually be more than three times the limit for driving a car and eight times the limit for driving an aircraft.
Legal limit for driving a car over here is 0.5, but you can be sacked when driving with 0.3 and showing signs of unsecure behavior in traffic, whatever that is supposed to mean. As for flying an airplane, limit is 0.2.