I can't imagine believing that this computation, ordinarily automated by these out of service systems, can be performed correctly by crews that probably haven't had to do this in ... years?
At most places there is an iPad app that does the calculation locally. So it's mostly entering a lot of numbers and checking that the results make sense. Usually both crew members do it individually, and then cross check the results.
I can't imagine believing that this computation, ordinarily automated by these out of service systems, can be performed correctly by crews that probably haven't had to do this in ... years?