Prison ship
A prison ship or penal deportation vessel was a type of transport ship that acted as a penal facility. Most times, such vessels were used to ferry criminals from one prison or detention facility to another to serve out their sentence.

Jonathan Archer and his chief engineer Charles Tucker III were once prisoners on an Enolian transport serving as a prison ship. ()

At least one Klingon  ship was used as a prison ship during the  in the late 2250s. ()

In 2267, Spock rebutted James T. Kirk's thought that the  might be a penal deportation vessel. He felt that given the chaos of the time, it would be inefficient to waste such a spaceship for that purpose. When Kirk asked him for an alternate theory, he replied that, lacking any facts, he could not come up with one. ()

Deanna Troi, while portraying Major  on the , claimed that she had tasted better viinerine on prison ships when told by Commander Toreth that she should have tried it. ()

Prison ships operated by the Nygeans were used in such a fashion. ()

Types of prison ships 
 Enolian transport
 Nygean prison ship

External link 

ja:囚人護送船
Spacecraft classifications
Punishments