The criminals boarded the prison ship that would take them across the waters to the main penitentiary.
Elmo was playing pirate and stole one of cookie monster's cookie's so he locked him up in a prison ship.
People use steamships
this ship is seaworthy.
I am ready to come aboard the ship. This ship has an oaken hull. The ship is moored offshore.
The thief used bribery to escape prison.
the privateer use there ship only when going in war
The ship sank to the bottom of the ocean.
Many people convicted of crimes are sent to prison. These days our prisons are over crowded.
Example sentence - He was released early from prison and placed on parole for 5 years.
You use it like the noun (person place or thing) in this case it is a place
"The sunken ship sat on the bottom of the ocean."
"The submarine fired a torpedo at the large ship."