Vessels sailing under South Korea Country Flag are required to have on board this flag as part of flag state requirements that derive from maritime regulations in the International Code of Signals and the International Safety Management (ISM) Code. These codes are published by the International Maritime Organization (IMO) as an ongoing effort to reinforce maritime safety procedures and communications to the international maritime community. Fleet management companies and ship owners are responsible to ensure that each vessel in their respective fleets have the appropriate flag signage onboard to be in compliance. This flag is used to identify the flag state a vessel is sailing under and to communicate with other vessels under the provisions of the International Code of Signals.
The South Korea Country Flag is represented by a white background. Centered in the background is a symbol called a Taeguek, appearing similar to a Yin and Yang and colored blue on the bottom and red on the top. Four rectangular ensignia called trigrams border the symbol, forming corners around it. These are black and white, formed either of lines or forming bars, depending upon how it is received. These are said to represent Earth and metal, Fire, water and air. Together, the design of the South Korea Country Flag is know as a Taegeukgi. The white background is said to stand for the purity of the Korean people. The Taeguek is meant to represent the source of everything in the Universe. As a team, the pattern demonstrates the Universe's uninterrupted progress through eternity. The South Korea Country Flag was adopted in 1948. It was originally designed to be the official symbol of the Korean Empire in 1882, being kept by South Korea. The Flag demonstrates a designated proportional ratio of 2:3, height to length, respectively.