File:D-4 concept sketch.jpg

Sketch for a D4 class Klingon battle cruiser, designed by John Eaves, which was originally built as a new model for Vorok's battle cruiser. The model, however, did not meet expectations, and due to time constraints, Eaves was unable to make the necessary repairs to the new model and was forced to replace the model with the battle cruiser model previously built for ''Star Trek: Deep Space Nine. (Star Trek Communicator issue 136)
 * Additional information can also be found at the defunct .