The Ambassador-class was developed early in the 24th century. Acting as a replacement for duties of the retired Constitution-class, its mission objectives included exploration, defense, and diplomacy. The class was later replaced by the Galaxy-class, some ships were still in use during the 2360's, however by the 2370's the Ambassador have been largely phased out of service.

There are two different versions of the Ambassador-class. The Flight-I was the first model built for the Enterprise-C, and later modified for other Ambassador shots, such as the USS Zhukov and the USS Yamaguchi. The differences include modifications to the bridge module, sensor dome, navigational deflector dish, saucer and neck, location of the nacelles, cowlings on the bussard collectors, the third shuttlebay, width of the engineering hull, and color of the impulse engine. The Enterprise-C is often shown as a Flight-II Ambassador, without the third shuttlebay, even though it was clearly seen as a Flight-I in "Yesterday's Enterprise" - TNG.

The Ambassador-class ship was designed by Rick Sternbach and Andrew Probert. The model, built by Greg Jein, was intended to suggest an intermediate step between the Excelsior-class and the Galaxy-class starships.

Related Links:
Designing the Enterprise-C, Ambassador-class Variants (EAS)

USS Adelphi NCC-26849
   Destroyed at Ghorusda killing 47 crew members.
   "Tin Man" - TNG.
USS Ambassador NCC-10521
   Prototype listed in TNG Technical Manual.
USS Enterprise NCC-1701-C
   Destroyed at Narendra III in 2344 defending a Klingon outpost.
   See Enterprise-C page for more information.
   "Yesterday's Enterprise" - TNG.
USS Excalibur NCC-26517
   Ship in Captain Picard's blockade during the Klingon Civil War. Commander Riker temporary commanded this ship. At an unknown    date encountered the Borg.
   "Redemption" - TNG. "Survival Instinct" - VOY.
USS Exeter NCC-26531
   Lieutenant Tom Paris's former post. Served in the Ninth Fleet in 2374.
   "Non Sequitur" - VOY. "You Are Cordially Invited…" - DS9
USS Gandhi NCC-26632
   Ship assigned to the Lagana sector for a terraforming mission in 2369.
   Named for Mohandas Karamchand Gandhi.
   "Second Chances" - TNG.

USS Horatio NCC-10532
   Destroyed in 2364 near Dytallix B to cover up a conspiracy within Starfleet Command.
   "Conspiracy" - TNG.
USS Valdemar NCC-26198
   Dispatched to the Federation-Cardassian Demilitarized Zone in 2370.
   Named for Valdemar Poulsen, inventor of the tape recorder.
   "Tribunal" - DS9.

USS Yamaguchi NCC-26510
   Ship destroyed at Wolf 359 in 2367.
   "Emissary" - DS9.
USS Zhukov NCC-26136
   Barclay's first assignment. Transferred several science teams to the USS Enterprise NCC-1701-D in 2368.
   Named for Russian general Grigori Konstantinovich Zhukov. The model's hull is labeled USS Zuhkov NCC-62136 by mistake.
   "Hollow Pursuits" - TNG. "Data's Day" - TNG. "The Game" - TNG.

Type: Heavy Cruiser
Length: 526m
Beam: 310m
Mass: 3,710,000 tonnes
Speed: 9.5
Armament: Eleven Type 9 phasers