… there’s a strong current?
It is always a good idea to scope out the swim course prior to the race. If you realize there’s a strong current, find out which direction the current is pulling. If the current is pulling strong to the left, it is a good idea to start on the right side of the starting line and sight for the right side of the buoy. As you swim, you will be pulled to the left, but by starting to the farthest right possible, you will be fighting the current less and swimming less, which equals easier and faster swimming.