二に等とう航こう海かい士し

noun

second mate; second officer

A licensed deck officer rank on a merchant ship, below the chief mate (一等航海士). Responsible for navigation and watchkeeping.

See also: 一等航海士 (いっとうこうかいし)

• 彼かれは大おお型がたタンカーで二に等とう航こう海かい士しとして働