short course lane; 25m pool lane
Refers to a swimming pool lane shorter than 50m, typically 25m. Used in competitive swimming contexts, often contrasted with 長水路 (long course).
See also: 長水路
This competition will be held in a short course pool.
Short course records tend to be faster than long course ones.
Compound of 短 (short) + 水路 (waterway, channel), referring to a short swimming lane.