Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
해양 경비대는 감시선을 사용하여 해양을 감시합니다.haeyang gyeongbidae-neun gamsiseon-eul sayonghayeo haeyang-eul gamsihamnida.The coast guard uses patrol boats to monitor the seas.