Yi Sun is named after Korean naval commander, famed for his victories against the Japanese navy during the Imjin war in 1592 - 1598. Yi Sun also improved and resurrected the turtle ship. The ship's name derives from its protective shell-like covering. It had a dragon-shaped head at the bow that could launch cannon fire or flames from the mouth.
Fei Lu was a Chinese tower ship (Louchuan). The tower ships are dated to the Han dynasty 206 BC-220 AD. They were used as the central ship of a fleet and were equipped for boarding and attacking enemy vessels, as well as with siege weapons such as trebuchet.
Zheng He is named after a Chinese explorer from 15th century. Zheng commanded a fleet of treasure ships with which he embarked on expeditionary voyages to Southeast Asia, South Asia, Western Asia, and East Africa from 1405 to 1433. The treasure ships were mammoth ships with nine masts, four decks, and were capable of accommodating more than 500 passengers.