Build:Vessel Size Scale
3.1 Vessel Size Scale
Starships can be categorized by size, based upon their mass. The following table details the Size scale, Length, Beam and Height ranges and Structural Unit (SU) amount, according to the ship’s mass.
| Mass Range (mt) | Size | Length (m) | Beam (m) | Height (m) | Max SU | Year* |
|---|---|---|---|---|---|---|
| 0 - 2 | 1 | 1 - 5 | 1 - 4 | 0 - 1.9 | 325 | |
| 2.1 - 30 | 2 | 6 - 50 | 4 - 10 | 2 - 5 | 300 - 625 | 2064 |
| 31 - 60,000 | 3 | 51 - 100 | 11 - 25 | 6 - 20 | 600 - 1,000 | 2162 |
| 60,001 - 200,000 | 4 | 101 - 150 | 26 - 50 | 21 - 30 | 800 - 1,300 | 2215 |
| 200,001 - 400,000 | 5 | 151 - 300 | 51 - 100 | 31 - 50 | 900 - 1,900 | 2231 |
| 400,001 - 1,875,000 | 6 | 301 - 400 | 101 - 200 | 51 - 80 | 1,300 - 2,500 | 2245 |
| 1,875,001 - 4,000,000 | 7 | 401 - 600 | 201 - 400 | 81 - 125 | 1,500 - 2,750 | 2284 |
| 4,000,001 - 5,000,000 | 8 | 601 - 700 | 401 - 550 | 126 - 200 | 2,000 - 3,250 | 2322 |
| 5,000,001 - 6,000,000 | 9 | 701 - 800 | 551 - 700 | 201 - 300 | 2,250 - 3,500 | 2362 |
| 6,000,001 - 8,000,000 | 10 | 801 - 1,000 | 701 - 800 | 301 - 400 | 2,500 - 3,750 | 2384 |
| 8,000,001 - 10,000,000 | 11 | 1,001 - 1,500 | 801 - 1,000 | 401 - 600 | 2,750 - 4,000 | n/a |
| 10,000,001 - 12,000,000 | 12 | 1,501 - 2,000 | 1,001 - 1,200 | 601 - 800 | 3,000 - 4,500 | n/a |
| 12,000,001 - 14,000,000 | 13 | 2,001 - 3,000 | 1,201 - 1,500 | 801 - 1,000 | 3,500 - 5,000 | n/a |
| 14,000,001 - 17,000,000 | 14 | 3,001 - 4,000 | 1,501 - 2,000 | 1,001 - 1,200 | 4,500 - 6,500 | n/a |
| 17,000,001 - 20,000,000 | 15 | 4,001 - 5,000 | 2,001 - 2,500 | 1,201 - 1,500 | 5,000 - 8,000 | n/a |
| 20,000,001 - 23,000,000 | 16 | 5,001 - 6,000 | 2,501 - 3,000 | 1,501 - 1,800 | 7,000 - 11,000 | n/a |
*These years for sizes allowed generally apply only to the UFP, though most Alpha Quadrant species also follow it. The exceptions are for the Breen, Ferengi, Klingons and Romulans (who can build Size 10 starting in the 2370’s). Vulcans could build up to Size 6 by 2145.
SU amounts are directly proportional to the starship’s mass. For example, a 400,001 mt starship would have 1,300 SUs, while a 1,875,000 mt starship – also a Size 6 – would have 2,500 SUs. SU weight varies according to ship class, so that on the lighter Size 6 starship above a SU would weigh 308 mt, while on the heavier Size 6, a SU would weigh 750 mt. Equipment, systems and spaces for a starship are ‘purchased’ with allotted SUs.