Before revision: It lasts 6–10 hours for 1 candidate or 8–14 hours for 2 candidates, and is conducted in a boat between 7 m (23 ft) and 24 m (78 ft) in length.
After revision: It lasts 6–one0 hours for 1 candidate or 8–14 hours for two candidates, and is conducted in a boat between 7 m (23 ft) and 24 m (78 ft) in length.