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Eymorg Ship

Size Comp
Universe : Prime Timeline
Affiliation : Morg / Eymorg
Class Name : Eymorg Ship
Type : Interstellar vessel1
Unit Run : Only one vessel known to exist 1 built in total.
Commissioned : Unknown, but probably at least several centuries ago1
Dimensions : Length : 250 m2
Diameter : 30 m
Span : 77 m
Decks : 8
Mass : 469,000 metric tons
Crew : 11, Full complement uncertain, but can be piloted by a single individual
Armament : None observed
Warp Speeds
(TOS scale) :
Capable of warp speeds on ion drive1
Strength Indices :
(Galaxy class = 1,000)
Beam Firepower : -
Torpedo Firepower : -
Weapon Range and Accuracy : -
Shield Strength : -
Hull Armour : -
Speed : -
Combat Manoeuvrability : 6,400
Overall Strength Index : 18
Diplomatic Capability : At least equal to Starfleet Grade 2
Expected Hull Life : 0


One of the more unique designs of spacecraft, the Eymorg vessel was encountered by the USS Enterprise on Stardate 5431.4. The ship was of a totally unfamiliar design, comprising a tapered cylindrical main hull with a set of four much smaller hulls mounted around the midsection.

The ship was fitted with ion propulsion, which it could use to travel at faster than light speeds. Ion drive systems should only be capable of travel at sublight speeds, and the ability of the vessel to travel at warp speeds is a highly impressive feat.

The ship was also fitted with a transferral device similar in function to a Federation transporter. Its single crew member used this device to beam to the Enterprise bridge and incapacitate the crew. No obvious ship mounted weaponry or defensive technology was displayed during the encounter.1

Colour key

Canon source Backstage source Novel source DITL speculation


# Series Season Source Comment
1 TOS 3 Spock's Brain
2 Speculative Approximation.
Series : TOS Season 3 (Disc 1)
Episode : Spock's Brain
Source : Speculative
Comment : Approximation.


The Eymorg ship is most interesting because of its ion propulsion system. At the beginning of the episode this is regarded with awe by the Enterprise crew, who claim it is far in advance of their own technology. In fact ion propulsion systems are relatively simple technology which NASA is developing right now.

However, it quickly becomes clear that this ion drive can do something that nothing NASA is working on can; it can propel the ship at FTL speeds. When Kirk and the crew wake up after being incapacitated they follow the Eymorg ship's ion trail for 15 hours 20 minutes at warp 6. That's a distance of 3,312 light hours using the speed = warp factor3 commonly accepted for TOS. A ship travelling just under light speed would have taken 138 days to cross this distance.

So either the Eymorg ship travelled significantly faster than light, or Kirk and crew lay on the deck unconscious for over four months. The latter is virtually impossible - without food or water, its almost impossible for a Human to survive more than 18 days.

An ion drive capable of propelling a ship at FTL speeds would certainly account for the Enterprise crew's astonishment at the technology. How the ion drive accomplishes its task is something we could only speculate at, but on the Eymorg planet Scotty says he is detecting enough energy to knock a planet clear out of orbit. Clearly either the ship or base has a pretty impressive generating capacity!

We don't know for sure that there was only one person aboard the ship, but the teacher device only seems to accommodate one person and the time scale involved would seem to preclude using it on large numbers before they set out on a trip. So unless there are other teacher devices - which there may well be - a single person crew seems most likely.

© Graham & Ian Kennedy Page views : 24,207 Last updated : 12 Mar 2013