to keep the swimmers in there own lanes
There are 10 lanes in an olympic swimming pool
Typically 10 lanes.
10- 8 for swimming and two outside lanes to keep the backsplash down
8 or 6
In a normal Olympic Pool there are 10 lanes. I'm not too sure what a semi Olympic pool is!
An olympic size swimming pool has 10 lanes however only the middle 8 lanes are used for competition, with the outside two lanes being used to prevent the swimmers' waves bouncing off the walls
50 meters long and 8 lanes