[zolthrowaway]

Rule 1, stay to the right. Generally, there is a black line running down the center of the line. Stay to the right of it, it's like traffic. Swim down on the right, reach the wall, turn, turn around swim down on the right again (you're on the opposite side). You don't have to coordinate with anyone. That's why it's courteous to stay to the corner of the lane when you are stopped at a wall.