Centrum World Classification has two components: Waves and Zones.
Centrum Wave Classification[]
A Wave is the Centrum equivalent of Homeline's Quantum.
| Wave | Two | One | Zero | Minus One |
Minus Two |
Minus Three |
Minus Four |
Minus Five |
|---|---|---|---|---|---|---|---|---|
| Quantum | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 |
Centrum Zone Classification[]
A Zone is the Centrum equivalent of Homeline's World Class system but unlike Homeline they don't subdivide zones with numbers.
- Zone Violet: The original homeworld.
- Zone Indigo: Colony worlds with no other humans. Unlimited access available to any Centrum citizen
- Zone Blue: Empty worlds, including those naturally inimical to human life. Access restricted by Interworld Service for safety reasons. This also includes “waste disposal” realities.
- Zone Green: Worlds with natives under adequate control. Travel restricted to Interworld and Uplift Service, and Grade 5s of any Service.
- Zone Yellow: Worlds without established control, with natives too primitive to pose a serious threat. Access limited to Interworld and Uplift Service agents of Grade 3 or higher, or to licensed Mining Service agents under I.S. supervision.
- Zone Orange: Worlds without established control, with natives who have or could soon develop technology sufficient for parachronics (TL7+). Access restricted to I.S. agents with authorization from an I.S. Grade 5 or higher.
- Zone Red: Hostile worlds, and those with capabilities (TL8+, psionics, or parachronics) which make them a potential danger. Access restricted to I.S. agents with authorization from an I.S. Grade 6 or higher.