Oberth-class

The Pegasus was a prototype ship, used as a testbed for many new systems designs, many of which were later used in the design of the Galaxy-class starships. While it was not widely known at the time, the Pegasus was also used a testing ground for an experimental phasing cloak, in direct violation of the Treaty of Algeron. The Pegasus crew protested the illegal test and eventually mutinied, forcing the captain, Erik Pressman, and seven other crew members to escape the ship in a pod. Shortly after the captain departed, the crew attempted to shut down the cloak. The device malfunctioned, and the ship drifted in space, in a cloaked state until it came to rest within the body of an asteroid in the Devolin system. All members of the crew, save the seven who escaped, were lost when the ship unphased, leaving parts of the ship open to vacuum and parts encased in solid rock. TNG The Pegasus.

Named after the famous winged horse of Greek mythology. As this screenshot proves, the Pegasus was originally intended to be a four-nacelled vessel. Budget considerations, however, forced the producers to use the Grissom model from Star Trek III: The Search for Spock. Name from dialogue. NCC from a screenshot. Class visually identified.

Lt. Anaanda Ziff served aboard this ship prior to her assignment to the Malone. TNG Eye of the Beholder.

Named after Norm Peterson, a character from the TV show "Cheers". Name from a computer display.

Alfonse D. Pacelli served aboard the Philadelphia prior to his assignment to the U.S.S. Syracuse. TNG Eye of the Beholder.

Name from a computer display.

Nebula-class

This ship was built at the 40 Eridani-A Starfleet Construction Yards and launched on stardate 40250.5. In 2367, the ship was under the command of Captain Benjamin Maxwell. Maxwell ordered an unauthorized attack on Cardassian forces near Sector 21503. Two Cardassian ships and a Cardassian science station were destroyed by the Phoenix. Maxwell said his actions were intended to prove his suspicions that the Cardassians had been planning a new offensive against the Federation. Maxwell was subsequently relieved of command of the Phoenix. TNG The Wounded.

Named after Zefram Cochrane's first warp ship. Name and class from dialogue. NCC from a computer display.

The Portland, along with a Cardassian cruiser, searched the Algira sector for Odo and Garak, when their runabout became missing in 2371 during the Romulan and Cardassian attack on the Founder's homeworld. DS9 The Die Is Cast.

Name from dialogue. The ST Encyclopedia speculates that the Portland is a Chimera-class vessel with the registry number NCC-57418.

Constitution-class

The Potemkin was one of five starships that participated in the disastrous test of the M-5 multitronic unit in 2268. TOS The Ultimate Computer. The Potemkin was to rendezvous the Enterprise at Beta Aurigae shortly after stardate 5928 to study gravitational influences in that binary system, until Dr. Janice Lester, in Kirk's body, changed the course. TOS Turnabout Intruder. TAS The Pirates of Orion. The Potemkin did scientific survey in 2293. Star Trek VI: The Undiscovered Country.

Named after Russian general Grigory Aleksandrovich Potemkin (1739-1791). Name from dialogue. Class visually identified. According to the Starfleet Technical Manual, the Potemkin's registry number is NCC-1711.

Excelsior-class

William T. Riker served aboard this vessel prior to his assignments to the Hood. Riker once employed the unconventional tactic of positioning the ship over a planet's magnetic pole, thus making the ship difficult to detect by an opponent's sensors. TNG Peak Performance. Riker took up poker so he could be in the officer's game at the Potemkin. TNG Lower Decks. In 2361, as a Lieutenant aboard the Potemkin, Riker led an away team to evacuate the science outpost on planet Nervala IV, and subsequently was promoted to lieutenant commander and commended for "exceptional valour" on the mission. It was not realized until later that a duplicate of Riker had been created in a transporter malfunction during the evacuation. TNG Second Chances. During the same year, the Potemkin was the last Federation starship to make contact with the failed Turkana IV colony, prior to the Enterprise-D's mission there in 2367. Potemkin personnel were warned by the colony's ruling cadres not to transport to the surface, or they would be killed. TNG Legacy. The Potemkin rendezvoused with the Enterprise-D on stardate 45587 to transfer Dr. Toby Russell to the Enterprise-D. TNG Ethics. In 2374, the ship was part of the 9^th Fleet headquartered at starbase Deep Space 9. Around stardate 51247.5, the Potemkin completed repairs and rejoined the fleet. You Are Cordially Invited.

Name from dialogue. Class visually identified. The ST Encyclopedia speculates that the Potemkin's registry number is NCC-18253.

The Princeton was one of the 39 Federation ships destroyed by the Borg during the Battle of Wolf 359. TNG The Best of Both Worlds, Part 2. The wreckage of the ship was relegated to a surplus depot in orbit around planet Qualor II. TNG Unification, Part 1.

Name and NCC from studio model (EAS, Masaki Taniko). The ST Encyclopedia speculates that the Princeton is a Niagara-class vessel.

The Prokofiev was dispatched to the border of the Federation-Cardassian Demilitarized Zone in 2370, following the arrest of Starfleet officer Miles O'Brien. DS9 Tribunal.

Named after 20th-century Russian composer Sergey Prokofiev (1891-1953). Name from dialogue. The ST Encyclopedia speculates that the Prokofiev is an Andromeda-class vessel with the registry number NCC-68814.

Nebula-class

This science ship, under the command of Lt. JG Piersall, was used by terraformer Gideon Seyetik for his project to reignite the dead sun Epsilon 119. DS9 Second Sight.

The ship was named after the mythological Greek Titan who stole fire from heaven for the benefit of mankind. According to Larry Nemecek, the ship's dedication plaque bore the quote "Sometimes you feel like a nut, sometimes you don't...". Name from dialogue. NCC from a screenshot. Class visually identified.

Prometheus-class

This ship was built at the Beta Antares Ship Yards and launched on stardate 50749.5. During one of the ship's first test flights, a group of Romulans commandeered the starship, killing her crew. While escaping Federation space, the Romulans used the ship's multivector assault capability to enable them to elude pursuit by the Nebula-class Federation starship Bonchune. Control of the ship was regained by the on-board Emergency Medical Hologram with assistance from the holographic Doctor from the Starship Voyager. VOY Message in a Bottle. In 2377, the Prometheus was part of the fleet to fight against a Borg sphere. The fleet escorted the U.S.S. Voyager back to Earth after the destruction of the sphere. VOY Endgame.

The Prometheus-class was designed by Rick Sternbach. The CGI model was labelled with NX-59650. The reason for the two different registries is that Mike Okuda's scenic art department made the dedication plaque and MSD with the NX-74913 registry, while the CGI art department, Foundation Imaging, created the NX-59650 registry not knowing about the NX-74913 one (SWDAO). Name from dialogue. NCC from MSD (ST Encyclopedia 3).

The Proxima became lost in the Gamma Quadrant sometime prior 2373. It was believed that the ship and crew fell victim to the Dominion. DS9 In Purgatory's Shadow.

Named after Proxima Centauri, a star 4.3 light years from Earth. Name from dialogue. The ST Encyclopedia speculates that the Proxima is a Nebula-class vessel with the registry number NCC-61952.

Ptolemy-class

Schematics of the Ptolemy appeared on a computer display in the bridge simulator at Starfleet Academy. Star Trek II: The Wrath of Khan. The same schematics also appeared on displays on the bridge of the U.S.S. Enterprise NCC-1701. Star Trek III: The Search for Spock.

Name, NCC, and class from a screenshot. This computer display is from the Starfleet Technical Manual. Some will correctly point out that the part with "PTOLEMY CLASS" was cut off due to the round display, but I'm not that pernickety.

Lt. Daniel L. Kwan served aboard the Pueblo prior to his assignment to the U.S.S. Seaview. TNG Eye of the Beholder.

Name from a computer display.