25 yards, four o rfive lanes, kickboards, cool water and a clock.
No lane ropes during lap swim. It's not like they won't put them in, they just don't have any at all.
The shallow end of the pool is shorter than the deep end. That's right you heard me. The line at the bottom of the pool stops directly before the wall in the shallow end. If you use the line to guide you, then just when you start your turn is when you you should have already flipped and so you're going hit your head- about fifty times until you get it through your thick skull that you have to flip early in the shallow end. But you'll be bleeding by that time and it's always time to get out when your lane is red.