Leonidas class

The Leonidas-class destroyer was a type of starship active in Starfleet service during the late 23rd century.

Similar in appearance to frigates, Leonidas's had dual warp nacelles on pylons above a saucer-shaped primary hull. Leonidas-class destroyers carried a crew complement of 247. They usually served on border patrol duty, along the Romulan Neutral Zone, the Organian Treaty Zone and near Orion territory. (Orion Press: "Runner")

Many of the class were upgraded starting in 2274. The crew capacity increased to 296 and armaments increased as well, from three phaser banks to six and two photon torpedo bays to four.