Pitts
The seniority system is not used to select who is command suitable. It is ONLY used to decide who will get the command slot amongst the FOs who consistently have demonstrated command standard during their sim and line checks. In other words, 'the weeding out of truly unfit for command' occurs during recurrent training. If there is, for instance, 2 command suitable FOs but only one slot, it makes sense to promote the most senior of the two.. It seems to me the easiest and fairest way.