Atmosphere

The atmosphere code is a UWP code to represent the breathing environment encountered on the world. Some atmospheres require specific personal equipment for survival and protection.

Vacuum or Trace Atmosphere: The atmosphere has a pressure of less than 0.1 atmospheres, which requires the use of a vacc suit.

Very Thin Atmosphere: The atmosphere has a pressure of 0 1 to 0.42 atmospheres, which requires the use of a compressor to ensure sufficient oxygen.

Tainted Atmosphere: The atmosphere contains an unusual taint such as such as disease, a hazardous gas mix, pollutants, or sulfur compounds which requires the use of a filter mask. Tainted, very thin atmospheres require a combination respirator/filter mask for survival.

Thin Atmosphere: The atmosphere has a pressure of 0 43 to 0.70 atmospheres. The atmosphere is a standard oxygen/nitrogen mix, which is breathable without assistance.

Standard Atmosphere: The atmosphere has a pressure of 0.71 to 1.49 atmospheres. The atmosphere is a standard oxygen/nitrogen mix, which is breathable without assistance.

Dense Atmosphere: The atmosphere has a pressure of 1.50 to 2.49 atmospheres The atmosphere is a standard oxygen/nitrogen mix, which is breathable without assistance.

Exotic Atmosphere: An unusual gas mix which requires the use of oxygen tanks, but protective suits are not needed.

Corrosive Atmosphere: A concentrated gas mix or unusual temperature creates a corrosive environment, which requires the use of a protective suit or vacc suit.

Insidious Atmosphere: The atmosphere is similar to a corrosive atmosphere, but extreme conditions cause the corrosive effects to defeat any protective measures in 2 to 12 hours.

Dense, High Atmosphere: Pressure at or below sea level is too great to support life but is breathable at higher altitudes.

Ellipsord: The world’s surface is ellipsoidal, not spherical Because the atmosphere remains spherical, surface atmospheric pressure ranges from very high at the middle to very low at the ends Breathable bands may exist at some point within the range of pressure.

Thin, Low Atmosphere: The world is large and massive, with a thin atmosphere which settles to the lowest levels of the terrain. The atmosphere is unbreathable at most altitudes except the very low ones (as in depressions or deep valleys)

WORLD ATMOSPHERE

Code	General Description	Pressure (ATM)
0	Vacuum	< 0.001
1	Vacuum (trace)	0.001-0.09
2	Vacuum (very thin tainted)	0.10-0.42
3	Vacuum (very thin)	0.10-0.42
4	Thin (tainted)	0.43-0.70
5	Thin	0.43-0.70
6	Standard	0.71-1.49
7	Standard (tainted)	0.71-1.49
8	Dense	1.50-2.49
9	Dense (tainted)	1.50-2.49
A	Exotic	varies
B	Exotic (corrosive)	varies
C	Exotic (insidious)	varies
D	Exotic (dense, high)	varies
E	Exotic (ellipsoid)	varies
F	Exotic (thin, low)	varies
Vacuum requires a vacc suit.
Tainted requires a filter mask.
Very thin requires a respirator.
Very thin tainted requires a combination respirator/filter mask.

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Far Future Enterprises or by permission of the author. The page history lists all of the contributions.

• Book 2
• Exotic Atmospheres