Competitive swimming in : Textile rule 2010

World Aquatics rulebook swimming — four strokes, a pace clock, and the gap between a club heat and an Olympic final. Competitive swimming is the measured, judged version of pool swimming: four strokes, relays, and a clock that records to hundredths. World Aquatics (FINA until 2022) writes the rulebook that clubs, schools and the Olympics share.

Most of the world’s racing happens in short-course 25-metre halls, not in Olympic finals. The skill ceiling in this atlas is high because technique, training load and race craft stack for a decade. Risk stays low relative to wreck or night diving: the hazards are overuse and the rare shallow-water dive, not current.

This chapter is a club-sport map, not a governing-body medical screen and not a live meet brief. Memberships and qualifying times belong to national federations. Municipal and club pools publish lane books before open-water leaps. Red Cross / federation lessons gate beginners — a dive card is not a pool pass.