USS Merrimac

From Star Trek: Gamma One

USS Merrimac is a Constitution-class heavy cruiser originally commissioned in 2352. The vessel underwent a major systems overhaul and was 'recommissioned' in 2266. In 2368, the Merrimac was assigned to general exploration duties in the Beta Quadrant. This mission was regarded as one of Starfleet's most successful exploratory missions of the late 23rd century. The vessel is lauded for making first contact with half a dozen new species during the course of its mission.

In 2274, Merrimac returned from its exploration mission and participated in several years of peace-keeping and patrol duties near the Tholian border.