Comet class

The Comet-class was a type of Federation reconnaissance science vessel (RSV) starship in Starfleet service in the early 25th century, a variant subclass of the design. These vessels were usually commanded by an officer holding the rank of one-star rear admiral or higher. An enhanced version, the fleet reconnaissance science vessel, was available for vice admirals. 

Specifications
The Comet-class recon science vessel was launched in 2409 to complement the existing -, - and es. All RSV classes were modular and their components interchangeable between them. All RSV starship classes featured a removable mission pod. 

In the mirror universe, the Comet-class was a design in use by the Terran Empire. Imperial Starfleet categorized the Comet-class as a deep space science vessel (DSSV). When the Tholian Assembly accessed alternate timelines in the Azure Nebula, Federation Starfleet gained access to the Comet-class DSSV and added it to its ranks. 

Livery
In the 25th century, the design of the Comet-class reconnaissance science vessel allowed its commanding officer to choose from different designs of livery, which could be modified further at starbases. These options were designated Type 1-5 and Veteran. 

Furthermore, the installation of deflector shields from specific factions modified the hull appearance, including shields from the Reman Resistance, the Breen Confederacy and the Dominion.