Choong Moo was the name given to the Yi Dynasty admiral Yi Sun-Sin. In AD 1592, he was reputed to have invented the world's first armoured battleship (Kobukson), which is said to be the precursor of today's submarine. The reason why this pattern ends in a left hand attack is to symbolise his regrettable death, having no chance to show his unrestrained potentiality checked by the forced reservation of his loyalty to the king.