高こう級きゅう船せん員いん

Meanings

1

noun

ship's officer

Refers to a senior crew member on a vessel, such as a captain, first mate, or chief engineer.

employee, member, number

船せん員いん
船員 is a general term for any crew member, while 高級船員 specifically refers to senior officers.
航こう海かい士し
航海士 is a licensed navigation officer, a specific type of 高級船員.

Compound of 高級 (high rank) and 船員 (crew member).