You ever make a similar foul up and swim more yardage/meters than you intend? Here’s what I did yesterday. Spending winters in FL, I do my pool swims at the Pompano Aquatics Center in Pompano Beach. It’s a nice complex with two pools. A large, Olympic size pool that is LCM 50m x 8 lanes. Or, set up for SCY, there are 13 lanes, and an area for water polo (or a rec pool when the team isn’t in the water). Most days, the large pool is set up for SCY. And, that seems to be popular for most fitness swimmers, so I just end up in the small SCM 25m x 5 lane pool (even though the water in the small pool is much warmer than I prefer at probably around 85-86°F.) But this winter I’ve gone in the large pool swimming SCY more. Mostly just because the water is cooler. And, since I do mostly long continuous swims for “miles” instead of a ## yards or meters, I just sort of make a mental note that I have to calculate my distance/laps differently — “Large pool = Yards.” You have to reserve lanes online in advance at this complex, and yesterday I reserved a lane in the large pool…thinking I’d be swimming SCY. But when I showed up to swim, the large pool was set up for LCM. No worries. I haven’t done that in a while. But as I swam, I inadvertently messed up thinking “big pool = yards” and was confused when my two-mile swim took me about 4-5 minutes longer than usual. Then it struck me — Duh! I’m swam meters, not yards. So, I ended up swimming ~2¼ miles (3600 meters) instead of ~2 miles (3600 yards). — Dan