船長は船

the captain and the ship

→ 船長
phrase Rare #38,217
the captain and the ship This is not a fixed expression. 船長 means “ship captain,” は marks the topic, and 船 means “ship”; the exact English phrasing depends on the rest of the sentence.
JA: 船長は船を港へ戻した。
EN: The captain returned the ship to port.

船長は船すべてを支配する

The captain is in command of everything on the ship.

時には船長は船運命を共にするものだ

Sometimes a captain goes down with his ship.

突然船長は船を離れた

Suddenly, the captain left the ship.

船長は船すべて統制する

The captain is in control of everything on the ship.