Seamark Viewer

간단한 도구는 구글지도에서 바다 마크를 볼 수 있습니다

Just start the app and navigate to your territory to view sea marks. This app is 100% free and comes with ads on the bottom of your display.

For more functionality try out NavShip

https://play.google.com/store/apps/details?id=de.cprosoft.navship