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DY-100 Class

Size Comp 1Size comp 2
Universe : Prime Timeline
Affiliation : Humans
Class Name : DY-100 Class
Type : Interplanetary transport1
Unit Run :
SS Botany Bay1 - Destroyed2
plus 3 others built in total. 1 have been lost in all. 3 have been retired from service.
Commissioned : 1988 - 1997, remained in service until 1997
Dimensions : Length : 120 m3
Beam : 22 m
Height : 33 m
Decks : 7
Mass : 74,000 metric tons
Crew : 401
Armament : No beam weapons
Defence Systems : Light Monotanium Single hull.
Low level Structural Integrity Field
Sub-impulse only : Acceleration : 1.5 m/s/s
Delta Vee : 60,000,000 m/s
Endurance : 10,000 hours for 12 hours.
Strength Indices :
(Galaxy class = 1,000)
Beam Firepower : -
Torpedo Firepower : -
Weapon Range and Accuracy : -
Shield Strength : -
Hull Armour : 0.31
Speed : -
Combat Manoeuvrability : 160
Overall Strength Index : 5
Diplomatic Capability : Approximately equal to Grade 1
Expected Hull Life : 20
Refit Cycle : Minor : 0 year
Standard : 0 years
Major : 4 years


The DY-100's were fielded during the late 1980's in order to explore the solar system via long duration missions carrying crews in suspended animation. The vessels were the first to be fitted with Ion drive propulsion, powered by nuclear reactors which would ba capable of operating for years at a time if necessary. This would allow the DY-100's to operate under continuous acceleration, thus reducing journey times drastically and allowing the craft to conduct many missions without refuelling.

Like many space related projects of the 20th century, the DY-100's suffered from escalating costs and technical problems. The planned run of nine was funded jointly by many of the major governments of the time, but the break-up of the Soviet Union during the development phase during the 1980's hit the project hard, and the design was re-worked several times in order to reduce the costs. Eventually the Russian government backed out altogether, and the remaining countries cut the order back first to six and eventually to four. The first DY-100 was launched in 1992, shortly before the start of the Eugenics wars. The first flight was a successful test run around the moon and back, with a crew of nine on board.

Three uncompleted DY-100 hulls were seized by the genetic tyrants who claimed control of the Asian and African continents. Rumours quickly spread that these were to be completed and used as orbital weapons platforms, or that the tyrants would establish a presence on the moon or mars. When the heavy fighting began the allies launched commando raids which succeeded in destroying two of the hulls and damaging the third. This was later believed to have been destroyed by a tactical nuclear weapon strike on its launch site.

So the situation remained for some three hundred years, until the Botany Bay was discovered drifting in space by the USS Enterprise. Many records of the DY-100 project had been lost during the third world war, and at first the Enterprise crew took the ships crew to be refugees from the Eugenics wars. However, it was quickly learned that the group were all genetically engineered super humans under the command of none other than Khan Noonian Sing, one of the worst of the tyrants. Khan seized control of the Enterprise with the help of one of the ships own crew members, and abandoned the last of the DY-100's in space. Captain Kirk and his officers were subsequently able to regain control of the Enterprise and recapture the criminals. Reluctant to imprison his captives, Kirk offered Khan the chance to settle on the uninhabited world of Ceti Alpha V - an offer which Khan accepted.1

Colour key

Canon source Backstage source Novel source DITL speculation


# Series Season Source Comment
1 TOS 1 Space Seed
2 Star Trek II : The Wrath of Khan
3 Speculative Calculated by comparison with The E-Nil in TOS episode 'Space Seed'.
Series : TOS Season 1 (Disc 6)
Episode : Space Seed
Film: Star Trek II : The Wrath of Khan
Source : Speculative
Comment : Calculated by comparison with The E-Nil in TOS episode 'Space Seed'.


The DY-100 is a tough one to think about - my starting point was that this ship was equipped for long-duration flights since it was fitted for a crew in hibernation. Since Earth apparently had no travel beyond our own system prior to the 2060's, it seems that the DY-100's were interplanetary ships. However, in order to progress to a reasonable distance from Earth in only 300 years it seems to me that they must be capable of accelerating to a reasonable fraction of the speed of light - perhaps 20% or so.

Within these limitations I have tried to do is make this design as primitive as possible. This is necessary in order to minimize the difference between Star Treks predicted level of spacecraft development in the 1990's and the actuality which we live with. The Ion drive is perfectly possible, and articles I read in science magazines some years ago indicated that this form of propulsion would be capable of propelling spacecraft at reasonably low acceleration for long periods, thus achieving high speeds. I have no idea if the current state of the technology has changed this prospect, either for better or worse.

The DY-100 model was re-used in "The Ultimate Computer" as the freighter Woden. I have assumed that this ship was not in fact a DY-100 (it was never specifically stated as such), but is rather a look-alike design. This is mostly because it seems silly that a sub-warp vessel would be used as an interstellar freighter in TOS times.
© Graham & Ian Kennedy Page views : 37,394 Last updated : 13 Apr 2020