Nimitz class

The Nimitz class was a type of Federation starships, a tier 6 heavy battlecruiser class in Starfleet service in the 23rd and 25th centuries. 

Technical data
The Malachowski-class sported a compact hull design. Instead of a secondary hull, the saucer section expanded into a wedge at the rear. A pair of nacelle pylons was attached on the rear ventral hull, behind the layers of decks extending from the ventral center of the saucer. Hanging below the sacuer, and at the front of the ventral decks, was the deflector dish. The lowermost point of the saucer section was the sensor dome. Impulse engines marked the rear of the hull. The warp nacelles on the pylons were long and rectangular.

The basic color was two-toned metallic gray. The ship's registry sat atop a half circle of darker metallic paint. The same paint formed a triangle between the half-circle and the bridge lights. Two trapezoid blocks were on the extended aft section of the saucer. These were reminiscent of the. Overall, the ship's design echoed elements of the Miranda- and es. 

Service history
Class had entered service by 2256. 

Following the loss of many Kurtzman-Beyer warp drive-based vessels at Yard 39 in 2259, the class was phased out of service in favor of Cochrane-Archer warp assemblies. Following the recovery of Yard 39 in 2411, the Starfleet updated the class with modern technology and it re-entered service as a tier-6 spacecraft. (SS STO (Utopia Planetia: The Mystery of Yard 39), website: "The Stats of the Europa Class!")