Twin-hulled and powered boat developed for sport and recreation in the second half of the 20th century. Its design is based on a raft of two logs bridged by planks that had earlier been used by peoples in the Indonesian archipelago and throughout Polynesia and Micronesia. Early catamarans were up to 21.3 m (70 ft) long, originally paddled by many men, and used for visiting, in war, and in exploration. Especially after the sail was added, voyages of more than 3,704 km (2,000 mi) were made.