<p>It IS confusing - my son is a third classman (sophmore). They place students in A or B split based on their sports schedules. Fall sports are A split; spring sports are B split. Or that was the logic I was told. It’s a scheduling device. Then you can split them up by “above or below deck” or by company. Thus most kids define themselves as being “4th Co, below decks, A split.” Then you know who they live and train with, what they are studying and what their on/off campus schedule is…</p>