Grayson class

The Grayson-class was a Federation class V repair tender starship in Starfleet service in the 23rd century, becoming active on reference stardate 2/15.

Specifications
The Grayson-class vessels crewed 20 officers and men, and could carry cargo rated at 250 SCU (standard cargo units). The vessels weighed 48,000 metric tons, measured 220 meters in length, 85 meters in width and 58 meters in height. The Grayson had one standard (6-person) personnel transporters and a single cargo transporter stage.

The Grayson used warp engines of the FWE type, rated to cruise at warp factor 7 and max out at warp factor 9. The Grayson impulse engines were of the FIC type. The Grayson weapons consisted only of a single phaser emitter, with forward, port and starboard firing arcs and ships of this type were defended by FSA model deflector shields.

Service history
The Grayson vessels were designed as a tender class to support a program of full-time navigational beacon repair. Although initial prototypes were unarmed, a defensive weapon was added after some unfortunate encounters with outlaws. The Grayson design includes a detachable drydock structure that can be left behind to repair beacons while the ship continues on other stopovers. Many vessels of this type were crewed by junior officers hoping to prove themselves as capable space personnel and other more seasons veteran trying to redeem stagnant careers. In many cases, duty aboard a Grayson tender was not considered a prime assignment.

By the mid-to-late 2280s, over 140 of these ships had been constructed. 

Background
Presumably, the first ship of this series would have been called USS Grayson, although such a vessel was never specifically named in the source mentioning this class. It was specified that registry codes assigned to this class ranged from NCC-91400 to NCC-91600 without mentioning any ship names.