Total distance is 100 meters. Pairs (2 men or 2 ladies) take part in OCTOPUS 100 m in 50 m pool. At the starting point athletes must be ready on the right and left sides from pool curbstones. One athlete must wear scuba, another one should use mask, snorkel and fins. NOTE: in mixed couples the team can decide who will wear scuba – man or lady. After start divers enter to the water by giant step. Scuba diver (next donor) descends and swims underwater. The finswimmer (next acceptor) swims underwater with the breath hold.
Before 15 m line from the border donor must supply acceptor with alternate air source (octopus). Acceptor must start breathing from octopus and keep a stable physical contact with donor, avoiding octopus loss. If athletes start air sharing later than 15 m the penalty is 10 seconds. Athletes should continue swimming in a physical contact and sharing air. At the 15 m line before opposite border athletes can stop air sharing and make reverse independently and start sharing again after reverse (but not later than 15 m). They finish the distance when they reach opposite border (100 m). Finish is registered when the scuba diver touches the border with his hand. Maximum length of octopus hose is 110 cm.