The Korea Meteorological Administration issued a high wave advisory on November 21st at 1:00 PM for the outer offshore waters of the southern part of the East Sea, specifically north of Ulsan. This warning indicates potentially dangerous wave conditions in the designated area. Mariners and coastal communities are advised to take necessary precautions. The advisory aims to alert vessels and individuals engaging in maritime activities to the heightened risks presented by the strong waves. This is a standard procedure to ensure safety during periods of inclement weather. The public should remain vigilant and follow the guidance of local authorities regarding sea travel. The advisory remains in effect until further notice from the meteorological agency.