Push-ups, for instance, are always done facing the water. Instructors assigned a swim buddy to each person and formed platoons. Buddies are responsible for each other. You had to know where your buddy was at all times. When your buddy gets punished, you get punished.
Platoon leaders are responsible for their team members.
Instructors mixed up their commands, moved people around, and complained how unprepared, how unorganized a group we were. It also emphasized the urgency to act and function as a group. We learned that nothing we did was correct or to instructor satisfaction. Before beginning Pool Drills, we were down on the pavement doing push-ups or some other exercise. You soon heard groans.