USS Excalibur (NCC-1664) was a Constitution-class heavy cruiser active in Starfleet service during the 23rd century. (TOS: "The Ultimate Computer")

The Star Fleet Technical Manual had the registry as NCC-1705.

Excalibur 's commanding officer, ca. 2252, was Captain Dmitri Vlasidovich, who was of the same Starfleet Academy class as Christopher Pike and Hood 's then-CO, Michaela Harrari. (TOS novel: The Children of Kings)

As a junior officer, James T. Kirk had served on Excalibur with Mike Walsh, future commanding officer of the second Constitution-class USS Constellation. (TOS novel: My Enemy, My Ally)

Excalibur's CO during the mid-2260s was Captain Harris.

Some sources list Captain Harris' first name as Thomas, others as Timothy. In Star Trek: Excalibur, it is Anton.

Terise Haleakala-Lobrutto had been an officer in the Sciences division of Excalibur but apparently transferred off prior to the M-5 incident. (TOS novel: The Romulan Way)

In 2268, Excalibur was severely damaged during exercises with the USS Enterprise. The Enterprise, under the control of the malfunctioning M-5 computer, fired its phasers at full power easily penetrating the minimally power shields of the Excalibur, killing the entire crew. (TOS: "The Ultimate Computer")


In 2272, the Excalibur, along with much of the Constitution fleet was refitted. (Ship Recognition Manual, Volume 4: Starships of the Original Series Era)

Captain Conrad was Excalibur's commanding officer from 2270-81. Lieutenant Commander Sorenson was chief engineer from 2268 to 75. (Orion Press: "Scotty's Vacation")

During the Kelvan War in 2285, Excalibur, under Captain Croft, was assigned to Task Force Four and was one of the few survivors of the engagement against the Kelvans. Her personnel were rescued by ships from Task Force Six. (Orion Press: In Harm's Way)

Rear Admiral Gregory Young commanded Excalibur -- at the time, deployed to the Starfleet Thirteenth Fleet -- in 2286.

Rear Admiral Young is said to have commanded Excalibur since 2280, which conflicts with the Orion Press accounts. (Starfleet Communiqué 20)

A Prime Team called the "Templars" was assigned to Excalibur. (Task Force Games: UFP: The Federation Sourcebook for Prime Directive)

The Excalibur was finally decommissioned in 2297. (Ship Recognition Manual, Volume 4: Starships of the Original Series Era)

Fan continuitiesEdit

Star Trek: ExcaliburEdit

Following the M-5 incident the Excalibur was salvaged. During its repairs it was partially refitted and served as a test bed for several of the upgrades that would be later applied to refit the Constitution class. After 18 months in drydock the Excalibur was relaunched under the command of Captain Thomas Nelson. (Star Trek: Excalibur)

The registry for this Excalibur is NCC-1705.

Star Trek: Black HawkEdit

Admiral Higdon, in his genealogical research on his family found that his great-grandfather, J.C. Snell, commanded the Excalibur shortly after her refit to an Enterprise subclass.

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