In 2370, a pair of such ships were upgraded, armed, and used by former Starfleet officer, Lieutenant Commander Calvin Hudson, in an attempted attack on a Cardassian weapons depot on Bryma, beginning the Maquis uprising. They were engaged by Benjamin Sisko on the USS Rio Grande forcing them into a strategic retreat. (DS9: "The Maquis, Part II"; TNG: "Preemptive Strike")
Large numbers of fighters were used by Starfleet in the Dominion War. During Operation Return, eight successive waves of fighters were sent to attack the Cardassian ships of a Dominion fleet, hoping to provoke them into breaking formation and creating an opening for the Federation fleet. (DS9: "Sacrifice of Angels") They were also present at the Second Battle of Chin'toka. (DS9: "The Changing Face of Evil")
These vessels were also utilized during the 2370s as flight trainers at Starfleet Academy. Schematics describing tese vessels as such were part of an information download package aboard the USS Voyager. When One was assimilating as much information as he could, the flight trainer could be seen on a screen he was learning from. It was later seen when Seven used a new device on her Borg alcove to upload information directly into her brain. (VOY: "Drone", "The Voyager Conspiracy", "Life Line")
Although not originally designed for combat, the ship that became known as the attack fighter was capable of being modified to carry an impressive arsenal. Designed for a civilian role, and sized similarly to the Starfleet runabout, the original design was only lightly armed, primarily intended for personnel and cargo transport.
When used by the Maquis, the fighters were armed with whatever weapons were available. The first examples of the ships used by the Maquis were armed with Pygorian weapons, including photon torpedoes, pulse cannons, ship-mounted high-energy disruptors and particle accelerators; these were used when an attack was planned at a weapons depot on the Bryma colony. (DS9: "The Maquis, Part II") Captain Keogh referred to these vessels as "lightly armed shuttlecraft," compared to the Dominion ships he expected to face later that year. (DS9: "The Jem'Hadar")
Ships of the class
- TNG: "Preemptive Strike"
The fighter cockpit interior, seen in "The Maquis, Part II", was a modification of the Type 15 shuttlepod set. It was reused later from the Deep Space Nine episode "The Search, Part I" onwards to represent the Type 18 shuttlepod cockpit.
The script of "Sacrifice of Angels" states that the attack fighters were firing a barrage of quantum torpedoes when attacking the Dominion lines.  The effects used for the phasers and quantum torpedoes of the fighters in this episode were not what is normally associated with these Starfleet weapons. The torpedo launchers were mounted on the wings and on the nose of the ship. In some shots, the wing torpedoes seem to be launched from the same spot where the pulse cannons were located in "The Maquis, Part II." In others, they seem to be coming from the three small visible tubes on each of the wings. These tubes would seem to be much too small to launch full-sized torpedoes.
The term "attack fighter" was used describe these vessels in "Sacrifice of Angels" and "What You Leave Behind", in the latter of which, they were also called simply "fighters"; they were also called "Federation fighters" in the former reference, as well as in "The Changing Face of Evil". An image depicting the port profile of the craft, was originally created by Doug Drexler, where it originally appeared in the Star Trek Encyclopedia (4th ed., vol. 1, p. 9), accompanying the main entry "Academy Flight Range" – though incorrectly depicting the Academy trainer craft that appeared in the Star Trek: The Next Generation episode "The First Duty", specifically Locarno's ship. This mislabeled image also appeared on numerous LCARS screens (as noted in the appearances listed above with a †) throughout Deep Space Nine and Voyager. According to Sternbach, the reason for this was because "[t]here was some editorial confusion over which little ship was the trainer." 
According to Original Starship Collection, the fighter is 25 meters long, and has 2 pilots. It is capable of warp 9.