Hull pressure compartments

A graphic showing the hull pressure compartments on the Enterprise

A hull pressure compartment was a notable section of a Federation Constitution-class starship.

As a member of the this class, the USS Enterprise had several hull pressure compartments throughout the ship, the locations of which were often displayed on computer graphics on the bridge. (TOS: "Day of the Dove")

The hull pressure compartment graphic was created by Production Designer Matt Jefferies. (The Star Trek Auction catalog, p. 21)