Choong-moo was the given name to thegreat admiral YI SUN-SIN of the yi dynasty.He was reputed to have invented the first armoured battleship(kobukson)which was the precursor of the present day submarine in 1592 ad.The reason why this pattern ends up with lefthand attack is to symbolise his regretable death having no chance to show his unrestrained potentialty checked by the forced reservation of his loyalty to the king.