When to use navy in Korean
Korean: 해군[ hae-gun ]

When to use it
Navy means the military force that works at sea. In Korean, 해군 means the ships and people who protect a country on the ocean. You use this word when talking about the military, the sea, or a job in the armed forces.
Example sentences
우리 삼촌은 해군에 있어요.
My uncle is in the navy.
학교에서 해군 사진을 봤어요.
I saw a picture of the navy at school.
항구에서 해군 배를 봤어요.
I saw a navy ship at the harbor.
내 친구는 해군이 되고 싶어요.
My friend wants to join the navy.
서점에서 해군 책을 샀어요.
I bought a book about the navy at the bookstore.
여행 중에 해군 박물관에 갔어요.
I went to a navy museum during the trip.