Class: Frigate (FF)
This ship, called the Pegh-class, was designed in the 2250s to appear as a small bulk freighter, designed to bait pirates and enemy raiders into attacking convoys of this ship.  Once the attackers closed to firing range, the Peghs would open up with their armaments, catching the enemy completely off guard.  Once word of the true nature of the Pegh-class spread across the galaxy, the class was relegated to police and customs enforcement duty.  Few still serve today, as the massive proliferation of the B'rel-class bird of prey pushed the Pegh out of service.  Many Peghs were sold as surplus ships and can now be found in some pirate and smuggler fleets, turning the tables on the Klingon Defense Force.