Starbase 74

Starbase 74 is the largest known orbital facility -- in fact, the largest structure of any kind -- built by the United Federation of Planets. It orbits the Federation planet Tarsas III.

Size

Starbase 74 is significantly larger than Earth Spacedock (seen in Star Trek III: The Search for Spock), even though the two structures have the same outward appearance. In fact, the proportions of Starbase 74 compared to the Enterprise-D seem to be similar to the proportions of Spacedock compared to the original Enterprise .

• Refit Constitution-class: 305 meters length x 140 meters beam
• Galaxy-class starship: 642.5 meters x 467 meters

The figures (from non-Canon sources) indicate that Starbase 74 is approximately 3.36 times longer than Earth Spacedock and give it nearly forty times Spacedock's overall volume.

Earth Spacedock is described as approximately 3.6km in diameter and 4.6km tall. Based on the size comparison using starships, Starbase 74 is approximately 12.1 kilometers in diameter and 15.5 km long (excluding the antenna towers at either end of the station, which would make the station over 18 km in overall length).

Comparing the Spacedock doors as was done by Graham Kennedy for his Daystrom Institute Technical Library gives a ratio of 2.3 to 1, and would make Starbase 74 a diameter of 8.8 kilometers and an overall height of 13.4 kilometers.

In Debates

Trekkies sometimes argue that the large scale of Starbase 74 demonstrates that the Federation has the industrial capacity to build thousands of starships per year, even though the timeframe for the construction of Starbase 74 is unknown (but it must be well within the 200 year history of the Federation).

Warsies counter-argue that, regardless of the time spent building it, many of the complex systems needed for a starship -- such as mass lightening systems, warp drive, impulse engines, and other systems needed for a vessel expected to travel between star systems under its own power -- are not necessary for a space station. Consequently, the construction of a space station would be, in many ways, much simpler than the construction of a starship, even if the station is very large in comparison.

In reply, Trekkies argue in turn that the stations still possess many systems in common, such as weapons, shields, limited forms of propulsion (such as thrusters), power plants, fuel storage, etc. They also note that the Federation built not one of these mammoth stations, but at least three others of the same class :

• Starbase 133 (TNG "Remember Me")
• Lya Station Alpha (TNG "Ensign Ro")
• Starbase 84 (TNG "Phantasms")

Also a large space station of unconfirmed size, though it's interior docking bay was virtually identical to Spacedock and Starbase 74 and it's sister stations was observed housing a Galaxy-class starship under construction as viewed from Drafting Room 5 viewports at the Utopia Planita Fleet Yards.

See Also

• Star Trek: Federation Industrial Capacity at Stardestroyer.net