Difference between revisions of "Atmosphere"
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− | The [[Atmosphere|Atmosphere Code]] is a [[UWP]] code to represent the breathing [[environment]] encountered on a [[world]]. | + | The [[Atmosphere|Atmosphere Code]] is a [[UWP]] code to represent the breathing (respiration) [[environment]] encountered on a [[world]]. |
* It represents the mixture of gases and other elements that may be present on a sufficiently sized [[world]] or [[moon]]. | * It represents the mixture of gases and other elements that may be present on a sufficiently sized [[world]] or [[moon]]. | ||
* Varying types of atmospheres require the use of [[protective clothing]] or [[mask]]s. {{Page cite|name=Worlds and Adventures|page=7}} | * Varying types of atmospheres require the use of [[protective clothing]] or [[mask]]s. {{Page cite|name=Worlds and Adventures|page=7}} | ||
* Very small [[world]]s, [[planetoid]]s, [[asteroid]]s, and other small objects almost never have an atmosphere unless artificially modified using advanced technology. | * Very small [[world]]s, [[planetoid]]s, [[asteroid]]s, and other small objects almost never have an atmosphere unless artificially modified using advanced technology. | ||
* [[Tent World]]s are an example of a world ordinarily too small to contain an atmosphere, but artificially and technologically modified to possess an atmosphere using [[paraterraforming]]. | * [[Tent World]]s are an example of a world ordinarily too small to contain an atmosphere, but artificially and technologically modified to possess an atmosphere using [[paraterraforming]]. | ||
− | * An [[Atmospheric Pressure| | + | * An [[Atmospheric Pressure|Atmospheric Code]] is a standard [[Third Imperium|Imperial]] [[Metric]]. |
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== Description ([[Specifications]]) == | == Description ([[Specifications]]) == | ||
Few [[world]]s will be found where a single chemical makes up the entire atmosphere. Most atmospheres have a complex gas mix which will include a variety of specific elements, some in great amounts, while others are barely detectable. Atmospheric mixes include active and inert gases. On Earth, oxygen (02) is active, but forms less than 25% of the total atmosphere around us. Three times as much is nitrogen (N2), plus a few trace elements such as argon. These inert gases are not usually required by animal or plant life, and take no part in the chemical reactions essential for [[life]] (except for nitrogen, a special case). They are, nonetheless, part of the atmosphere. In this [[AAB]] article, when we refer to a specific gas such as methane making up an atmosphere, we are referring to the active element, which may make up only a fraction of the total atmospheric mix. {{Page cite|name=Exotic Atmospheres|page=3-4}} | Few [[world]]s will be found where a single chemical makes up the entire atmosphere. Most atmospheres have a complex gas mix which will include a variety of specific elements, some in great amounts, while others are barely detectable. Atmospheric mixes include active and inert gases. On Earth, oxygen (02) is active, but forms less than 25% of the total atmosphere around us. Three times as much is nitrogen (N2), plus a few trace elements such as argon. These inert gases are not usually required by animal or plant life, and take no part in the chemical reactions essential for [[life]] (except for nitrogen, a special case). They are, nonetheless, part of the atmosphere. In this [[AAB]] article, when we refer to a specific gas such as methane making up an atmosphere, we are referring to the active element, which may make up only a fraction of the total atmospheric mix. {{Page cite|name=Exotic Atmospheres|page=3-4}} | ||
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=== World Atmosphere Classification Codes Table === | === World Atmosphere Classification Codes Table === | ||
As a generality, small [[world]]s are unable to maintain a sufficient [[gravity]] to maintain an atmosphere and tend to have [[Thin Atmosphere|thinner]] or [[trace atmosphere]]s while larger worlds grow increasingly dense. [[Corrosive World|Corrosive]] and [[insidious world]]s tend to be at extreme ends of the tolerable temperature spectrum. | As a generality, small [[world]]s are unable to maintain a sufficient [[gravity]] to maintain an atmosphere and tend to have [[Thin Atmosphere|thinner]] or [[trace atmosphere]]s while larger worlds grow increasingly dense. [[Corrosive World|Corrosive]] and [[insidious world]]s tend to be at extreme ends of the tolerable temperature spectrum. | ||
− | + | {| class="wikitable sortable" | |
− | + | |- | |
− | | | + | !colspan="9"| Atmospheric Code Descriptions |
+ | |- | ||
+ | ! [[Symbol]] | ||
! Code | ! Code | ||
! Specific Description | ! Specific Description | ||
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! Remarks | ! Remarks | ||
|- | |- | ||
+ | | [[File: ATM-0-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 0 | | 0 | ||
| [[Vacuum]] | | [[Vacuum]] | ||
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| Vacuum requires a [[vacc suit]]. The atmosphere has a pressure of less than 0.001 atmospheres, which requires the use of a [[vacc suit]]. | | Vacuum requires a [[vacc suit]]. The atmosphere has a pressure of less than 0.001 atmospheres, which requires the use of a [[vacc suit]]. | ||
|- | |- | ||
+ | | [[File: ATM-1-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 1 | | 1 | ||
| ([[Trace Atmosphere|Trace]]) | | ([[Trace Atmosphere|Trace]]) | ||
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| The atmosphere has a pressure of less than 0.1 atmospheres, which requires the use of a [[vacc suit]]. | | The atmosphere has a pressure of less than 0.1 atmospheres, which requires the use of a [[vacc suit]]. | ||
|- | |- | ||
+ | | [[File: ATM-2-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 2 | | 2 | ||
| ([[Very Thin Atmosphere|Very Thin]] / [[Tainted Atmosphere|Tainted]]) | | ([[Very Thin Atmosphere|Very Thin]] / [[Tainted Atmosphere|Tainted]]) | ||
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| [[Very Thin Atmosphere|Very Thin]] tainted requires a [[filter respirator combination]] | | [[Very Thin Atmosphere|Very Thin]] tainted requires a [[filter respirator combination]] | ||
|- | |- | ||
+ | | [[File: ATM-3-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 3 | | 3 | ||
| ([[Very Thin Atmosphere|Very Thin]]) | | ([[Very Thin Atmosphere|Very Thin]]) | ||
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| [[Very Thin Atmosphere|Very Thin]] requires a [[respirator]]. The atmosphere has a pressure of 0.1 to 0.42 atmospheres, which requires the use of a [[respirator]] to ensure sufficient oxygen. | | [[Very Thin Atmosphere|Very Thin]] requires a [[respirator]]. The atmosphere has a pressure of 0.1 to 0.42 atmospheres, which requires the use of a [[respirator]] to ensure sufficient oxygen. | ||
|- | |- | ||
+ | | [[File: ATM-4-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 4 | | 4 | ||
| ([[Thin Atmosphere|Thin]] / [[Tainted Atmosphere|Tainted]]) | | ([[Thin Atmosphere|Thin]] / [[Tainted Atmosphere|Tainted]]) | ||
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| [[Tainted Atmosphere|Tainted]] requires a [[filter mask]]. The atmosphere contains an unusual taint such as such as [[Diseases & Plagues of Charted Space|disease]], a hazardous gas mix, [[pollutant]]s, or sulfur compounds which requires the use of a [[filter mask]]. | | [[Tainted Atmosphere|Tainted]] requires a [[filter mask]]. The atmosphere contains an unusual taint such as such as [[Diseases & Plagues of Charted Space|disease]], a hazardous gas mix, [[pollutant]]s, or sulfur compounds which requires the use of a [[filter mask]]. | ||
|- | |- | ||
+ | | [[File: ATM-5-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 5 | | 5 | ||
| [[Thin Atmosphere|Thin]] | | [[Thin Atmosphere|Thin]] | ||
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| ''[[Shirtsleeve World]]:'' No survival gear required. 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. | | ''[[Shirtsleeve World]]:'' No survival gear required. 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. | ||
|- | |- | ||
+ | | [[File: ATM-6-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 6 | | 6 | ||
| [[Standard Atmosphere|Standard]] | | [[Standard Atmosphere|Standard]] | ||
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| ''[[Shirtsleeve World]]:'' No survival gear required. 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. | | ''[[Shirtsleeve World]]:'' No survival gear required. 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. | ||
|- | |- | ||
+ | | [[File: ATM-7-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 7 | | 7 | ||
| ([[Standard Atmosphere|Standard]] / [[Tainted Atmosphere|Tainted]]) | | ([[Standard Atmosphere|Standard]] / [[Tainted Atmosphere|Tainted]]) | ||
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| [[Tainted Atmosphere|Tainted]] requires a [[filter mask]]. | | [[Tainted Atmosphere|Tainted]] requires a [[filter mask]]. | ||
|- | |- | ||
+ | | [[File: ATM-8-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 8 | | 8 | ||
| [[Dense Atmosphere|Dense]] | | [[Dense Atmosphere|Dense]] | ||
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| ''[[Shirtsleeve World]]:'' No survival gear required. 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. | | ''[[Shirtsleeve World]]:'' No survival gear required. 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. | ||
|- | |- | ||
+ | | [[File: ATM-9-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| 9 | | 9 | ||
| ([[Dense Atmosphere|Dense]] / [[Tainted Atmosphere|Tainted]]) | | ([[Dense Atmosphere|Dense]] / [[Tainted Atmosphere|Tainted]]) | ||
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| [[Tainted Atmosphere|Tainted]] requires a [[filter mask]]. | | [[Tainted Atmosphere|Tainted]] requires a [[filter mask]]. | ||
|- | |- | ||
+ | | [[File: ATM-A-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| A (10) | | A (10) | ||
| [[Exotic Atmosphere|Exotic]] | | [[Exotic Atmosphere|Exotic]] | ||
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| An unusual gas mix which requires the use of [[oxygen tank]]s, but [[protective suit]]s are not needed. | | An unusual gas mix which requires the use of [[oxygen tank]]s, but [[protective suit]]s are not needed. | ||
|- | |- | ||
+ | | [[File: ATM-B-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| B (11) | | B (11) | ||
| ([[Corrosive Atmosphere|Corrosive]]) | | ([[Corrosive Atmosphere|Corrosive]]) | ||
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| A concentrated gas mix or unusual temperature creates a [[Corrosive Atmosphere|corrosive environment]], which requires the use of a [[Hostile environment suit]] or [[vacc suit]]. | | A concentrated gas mix or unusual temperature creates a [[Corrosive Atmosphere|corrosive environment]], which requires the use of a [[Hostile environment suit]] or [[vacc suit]]. | ||
|- | |- | ||
+ | | [[File: Atm-C-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| C (12) | | C (12) | ||
| ([[Insidious Atmosphere|Insidious]]) | | ([[Insidious Atmosphere|Insidious]]) | ||
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| 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. | | 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. | ||
|- | |- | ||
+ | | [[File: ATM-D-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| D (13) | | D (13) | ||
| ([[Dense Atmosphere|Dense]], [[High Pressure Atmosphere|high]]) | | ([[Dense Atmosphere|Dense]], [[High Pressure Atmosphere|high]]) | ||
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| Typically no survival gear required under many conditions. Pressure at or below sea level is too great to support life but is breathable at higher altitudes. | | Typically no survival gear required under many conditions. Pressure at or below sea level is too great to support life but is breathable at higher altitudes. | ||
|- | |- | ||
+ | | [[File: ATM-E-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| E (14) '''<sup>†</sup>''' | | E (14) '''<sup>†</sup>''' | ||
| ([[Ellipsoid Atmosphere|Ellipsoid]]) '''<sup>†</sup>''' | | ([[Ellipsoid Atmosphere|Ellipsoid]]) '''<sup>†</sup>''' | ||
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| Typically no survival gear required under many conditions. The world’s surface is [[Ellipsoid World|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. | | Typically no survival gear required under many conditions. The world’s surface is [[Ellipsoid World|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. | ||
|- | |- | ||
+ | | [[File: ATM-F-T5-Fan-Andy-Bigwood 22-Oct-2019a.jpg|100px]] | ||
| F (15) '''<sup>†</sup>''' | | F (15) '''<sup>†</sup>''' | ||
| ([[Thin Atmosphere|Thin]], [[Low Pressure Atmosphere|low]]) '''<sup>†</sup>''' | | ([[Thin Atmosphere|Thin]], [[Low Pressure Atmosphere|low]]) '''<sup>†</sup>''' | ||
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| varies | | varies | ||
| Typically no survival gear required under some conditions. This [[world]] is large and massive, with a [[thin atmosphere]] which settles to the lowest levels of the terrain. The atmosphere is un-breathable at most altitudes except the very low ones (…as in depressions or deep valleys). | | Typically no survival gear required under some conditions. This [[world]] is large and massive, with a [[thin atmosphere]] which settles to the lowest levels of the terrain. The atmosphere is un-breathable at most altitudes except the very low ones (…as in depressions or deep valleys). | ||
+ | |- | ||
|} | |} | ||
'''<sup>†</sup>''' - '''''NOTE''': In '''MgT''' and '''T5''', Atm type '''E''' is "'''Thin, Low'''", and Atm type '''F''' is "'''Unusual'''", which includes (but is not limited to) Ellipsoidal atmospheres.'' | '''<sup>†</sup>''' - '''''NOTE''': In '''MgT''' and '''T5''', Atm type '''E''' is "'''Thin, Low'''", and Atm type '''F''' is "'''Unusual'''", which includes (but is not limited to) Ellipsoidal atmospheres.'' | ||
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| [[Thin Atmosphere|5]], [[Standard Atmosphere|6]] or [[Dense Atmosphere|8]] | | [[Thin Atmosphere|5]], [[Standard Atmosphere|6]] or [[Dense Atmosphere|8]] | ||
| [[TL-0]] | | [[TL-0]] | ||
− | | No survival equipment required. | + | | No [[survival equipment]] required. |
|- | |- | ||
| [[Tainted Atmosphere|4, 7 or 9]] | | [[Tainted Atmosphere|4, 7 or 9]] | ||
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| [[Unusual Atmosphere|15 (F)]] | | [[Unusual Atmosphere|15 (F)]] | ||
| [[TL:7-9|TL-8]] | | [[TL:7-9|TL-8]] | ||
− | | Unusual atmospheres such as | + | | Unusual atmospheres such as [[ellipsoid]]s require [[survival equipment]] under selected conditions. |
|- | |- | ||
| [[Corrosive Atmosphere|11 (B)]] | | [[Corrosive Atmosphere|11 (B)]] | ||
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|} | |} | ||
− | === | + | == See also == |
− | + | {{Goods title list|Atmosphere equipment}} | |
− | + | === Library Data Referral Tree === | |
− | + | Please refer to the following [[AAB]] [[Library Data]] for more information: <br> | |
− | + | * [[Charted Space|Observing Charted Space]] | |
− | + | ** [[Universal World Profile]] ([[UWP]]) | |
− | + | *** [[Starport]] ([[Sp]]) | |
− | + | *** [[Planetary Size]] (S) | |
− | + | *** [[Atmosphere]] (A) | |
− | + | *** [[Hydrosphere]] (H) | |
− | + | *** [[Population]] (P) | |
− | + | *** [[Government]] (G) | |
− | + | *** [[Law Level]] (L) | |
− | + | *** [[Tech Level]] ([[TL]]) | |
− | + | ** PBG Sequence | |
− | + | *** P: [[Population Multiplier|Pop Multiplier]]s | |
− | + | *** B: [[Planetoid Belt|Belt]]s | |
− | + | *** G: [[Gas Giant]]s | |
− | + | *** TZ: [[Travel Zone]] | |
− | + | ** COG Sequence | |
− | + | *** C: [[Climate]] | |
− | + | *** O: [[Orbit]] | |
− | + | *** G: [[Gravity]] | |
− | + | ** Other System Data | |
− | + | *** [[Allegiance Code]] ([[AC]]) | |
− | + | *** [[Base Code]] (BC) | |
− | + | *** [[Cultural Extension]] ([[Cx]]) | |
− | + | *** [[Economic Extension]] ([[Ex]]) | |
− | + | *** [[Importance Extension]] ([[Ix]]) | |
− | + | *** [[Sophont Code]] | |
− | + | *** [[Trade Classification]] ([[TC]]) | |
− | + | ||
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== References & Contributors ([[Sources]]) == | == References & Contributors ([[Sources]]) == | ||
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|S10= {{Ludography cite|name= T5 Core Rules|page=409}} | |S10= {{Ludography cite|name= T5 Core Rules|page=409}} | ||
|S11= {{Ludography cite|name= The Universal World Profile|page=13-18}} | |S11= {{Ludography cite|name= The Universal World Profile|page=13-18}} | ||
− | |S12= [[Traveller Wiki Editorial Team]] | + | |S12= EXTERNAL LINK: [http://freelancetraveller.com/features/science/atmos/index.html Atmospheres] at [[Freelance Traveller]] by [[Robert O'Connor]] |
− | | | + | |S13= [[Traveller Wiki Editorial Team]] |
− | | | + | |S14= Author & Contributor: Lord (Marquis) [[Jonathan Sherlock]] |
− | + | |S15= Author & Contributor: Lord (Marquis) and Master Scout Emeritus [[Adie Alegoric Stewart]] of the [[IISS]] | |
+ | |S16= Author & Contributor: Lord (Marquis) and Master of Sophontology [[Maksim-Smelchak]] of the [[Ministry of Science]] | ||
}} | }} | ||
− | |||
{{LE|Planet|Planetology}} | {{LE|Planet|Planetology}} |
Revision as of 14:12, 21 June 2020
The Atmosphere Code is a UWP code to represent the breathing (respiration) environment encountered on a world.
- It represents the mixture of gases and other elements that may be present on a sufficiently sized world or moon.
- Varying types of atmospheres require the use of protective clothing or masks. [1]
- Very small worlds, planetoids, asteroids, and other small objects almost never have an atmosphere unless artificially modified using advanced technology.
- Tent Worlds are an example of a world ordinarily too small to contain an atmosphere, but artificially and technologically modified to possess an atmosphere using paraterraforming.
- An Atmospheric Code is a standard Imperial Metric.
Description (Specifications)
Few worlds will be found where a single chemical makes up the entire atmosphere. Most atmospheres have a complex gas mix which will include a variety of specific elements, some in great amounts, while others are barely detectable. Atmospheric mixes include active and inert gases. On Earth, oxygen (02) is active, but forms less than 25% of the total atmosphere around us. Three times as much is nitrogen (N2), plus a few trace elements such as argon. These inert gases are not usually required by animal or plant life, and take no part in the chemical reactions essential for life (except for nitrogen, a special case). They are, nonetheless, part of the atmosphere. In this AAB article, when we refer to a specific gas such as methane making up an atmosphere, we are referring to the active element, which may make up only a fraction of the total atmospheric mix. [2]
World Atmosphere Classification Codes Table
As a generality, small worlds are unable to maintain a sufficient gravity to maintain an atmosphere and tend to have thinner or trace atmospheres while larger worlds grow increasingly dense. Corrosive and insidious worlds tend to be at extreme ends of the tolerable temperature spectrum.
Atmospheric Code Descriptions | ||||||||
---|---|---|---|---|---|---|---|---|
Symbol | Code | Specific Description | General Description | Pressure (Atm) | Remarks | |||
0 | Vacuum | Vacuum | < 0.001 | Vacuum requires a vacc suit. The atmosphere has a pressure of less than 0.001 atmospheres, which requires the use of a vacc suit. | ||||
1 | (Trace) | Vacuum | 0.001-0.09 | The atmosphere has a pressure of less than 0.1 atmospheres, which requires the use of a vacc suit. | ||||
2 | (Very Thin / Tainted) | Vacuum | 0.10-0.42 | Very Thin tainted requires a filter respirator combination | ||||
3 | (Very Thin) | Vacuum | 0.10-0.42 | Very Thin requires a respirator. The atmosphere has a pressure of 0.1 to 0.42 atmospheres, which requires the use of a respirator to ensure sufficient oxygen. | ||||
4 | (Thin / Tainted) | Thin | 0.43-0.70 | Tainted requires a filter mask. 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. | ||||
5 | Thin | Thin | 0.43-0.70 | Shirtsleeve World: No survival gear required. 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. | ||||
6 | Standard | Standard | 0.71-1.49 | Shirtsleeve World: No survival gear required. 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. | ||||
7 | (Standard / Tainted) | Standard | 0.71-1.49 | Tainted requires a filter mask. | ||||
8 | Dense | Dense | 1.50-2.49 | Shirtsleeve World: No survival gear required. 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. | ||||
9 | (Dense / Tainted) | Dense | 1.50-2.49 | Tainted requires a filter mask. | ||||
A (10) | Exotic | Exotic , Conventional | varies | An unusual gas mix which requires the use of oxygen tanks, but protective suits are not needed. | ||||
B (11) | (Corrosive) | Exotic , Conventional | varies | A concentrated gas mix or unusual temperature creates a corrosive environment, which requires the use of a Hostile environment suit or vacc suit. | ||||
C (12) | (Insidious) | Exotic, Conventional | varies | 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. | ||||
D (13) | (Dense, high) | Exotic, Unusual | 2.5 or greater [3] | Typically no survival gear required under many conditions. Pressure at or below sea level is too great to support life but is breathable at higher altitudes. | ||||
E (14) † | (Ellipsoid) † | Exotic, Unusual | 0.5 or less [4] | Typically no survival gear required under many conditions. 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. | ||||
F (15) † | (Thin, low) † | Exotic, Unusual | varies | Typically no survival gear required under some conditions. This world is large and massive, with a thin atmosphere which settles to the lowest levels of the terrain. The atmosphere is un-breathable at most altitudes except the very low ones (…as in depressions or deep valleys). |
† - NOTE: In MgT and T5, Atm type E is "Thin, Low", and Atm type F is "Unusual", which includes (but is not limited to) Ellipsoidal atmospheres.
Protective Measures Based on Atmosphere
The various atmosphere types require specific personal equipment for survival and protection. [5]
- Codes 0 and 1: No atmosphere and trace atmosphere require use of a vacc suit and associated support equipment.
- Codes 2, 4, 7, and 9: Tainted atmospheres require the use of specialized filter masks.
- Codes 2 and 3: Very thin atmospheres require the use of compressors to insure sufficient oxygen to breathe. The tainted very thin atmosphere requires a combination respirator/filter mask for survival.
- Codes 4, 5, 6, 7, 8, and 9: Thin, standard, and dense atmosphere are breathable without assistance unless tainted.
- Codes A, B, C, D, E, and F: Exotic atmospheres require the use of oxygen tanks, but protective suits are not usually required unless corrosive or insidious.
- Code B: Corrosive atmospheres require the use of protective suits or vacc suits.
- Code C: Insidious atmospheres are similar to corrosive atmospheres, but will defeat any personal protective measures in two to twelve hours.
- Codes D, E, and F: represent "Unusual Atmospheres" with special conditions such as Ellipsoid Atmospheres.
Basic Atmosphere Types
Combinations of the below atmospheres may exist and are not comprehensively listed:
- Corrosive Atmosphere
- Dense Atmosphere
- Ellipsoid Atmosphere
- Exotic Atmosphere
- High Pressure Atmosphere
- High Temperature Atmosphere
- Insidious Atmosphere
- Low Pressure Atmosphere
- Low Temperature Atmosphere
- Standard Atmosphere (Tolerable pressure, temperature, constituent gases, etc. for conventional lifeforms)
- Tainted Atmosphere
- Thin Atmosphere
- Trace Atmosphere
- Unusual Atmosphere
- Vacuum (Interstellar Medium)
- Very Thin Atmosphere
UWP & Atmospheres
The third digit in the UWP identifies the type of atmosphere that the world has. As a rule, only larger worlds have a gravitational field large enough to hold on to an atmosphere, but there certainly are exceptions. An atmosphere is essentially a layer of gas or gasses that cloak the surface of the planet and there are a number of reasons why a world may or may not be lucky enough to have one. As we have already mentioned, a big world has the muscle to keep its atmosphere and the bigger the world, in all likelihood the denser (...or thicker) the atmosphere will be. Conversely, moons and small planets with relatively low surface gravities will generally have only trace atmospheres, if they have anything at all. [6]
Other factors also come into play. A world sitting close to the main star might have its atmosphere stripped away by the destructive energy of the star's solar wind sweeping past. The only chance a planet has of retaining its layer of gasses in this situation, is if it also benefits from a molten core that is producing a protective magnetosphere. Compare the Earth, whose atmosphere is shielded by its magnetosphere, with Mars. The red planet has a trace or very thin atmosphere that was considerably thicker in ancient times, but as the planet cooled it first lost its magnetosphere and then its atmosphere. [7]
Yet there are exceptions; in the depths of the solar system, the moon Titan orbits the ringed planet Saturn. Titan is cold, far from the sun and seismically inactive. It has no magnetosphere and with a surface gravity of only 0.14 G should not be able to retain an atmosphere - yet it has a dense atmosphere that is 1.45 times thicker than that of Earth's Ganymede and Callisto, comparable-sized moons of Jupiter, are of a similar composition but do not have atmospheres. One theory suggests that Titan, being farther from the sun than the moons of Jupiter, was colder during its formation. Gasses were trapped in the ice at those low temperatures and later made their way into Titan's atmosphere. [8]
History & Background (Dossier)
All industrial societies must gain an expanded understanding of atmospheres, air pressure, atmospheric constituents, gas behavior, industrial pollutants, and other factors in order to build a successful, modern interstellar starfaring society of TL:10-12 or greater. The UWP is one of the external expressions of those expectations about atmospheric understandings within Charted Space.
Techno-Environmental Limits
The typical sophont species needs to invent various kinds of protective equipment in order to colonize atmospheres to which it is not native.
Techno-Environmental Limits Atmosphere
(Nomenclature) CodeMinimum
TLRemarks 5, 6 or 8 TL-0 No survival equipment required. 4, 7 or 9 TL-3 Tainted atmospheres require filters. 2 or 3 TL-5 Very thin atmospheres require compressors. 13 (D) or 14 (E) TL-5 Unusual atmospheres require a variety of protective equipment. 0 or 1 TL-8 Trace or vacuum atmospheres require a vacc suit and oxygen tanks. 10 (A) TL-8 Unbreathable atmospheres require oxygen tanks. 15 (F) TL-8 Unusual atmospheres such as ellipsoids require survival equipment under selected conditions. 11 (B) TL-9 Corrosive atmospheres require a variety of capable protective equipment. 12 (C) TL-10 Insidious atmospheres require a variety of heavy-duty protective equipment.
See also
Atmosphere equipment
- Advanced Base
- Atmosphere Tester
- Atmospheric Survival Suit
- Bioscanner
- Body Pressure Suit
- Combat Environment Suit
- Compressor
- Filter Mask
- Filter Suit
- Hazard Suit
- Hostile Environment Suit
- Oxygen Mask
- Oxygen Rebreather
- Oxygen Tank
- Pressure Tent
- Protective Suit
- Rescue Ball
- Respirator
- Tank Pressure Gauge
- Vacc Suit
Library Data Referral Tree
Please refer to the following AAB Library Data for more information:
- Observing Charted Space
- Universal World Profile (UWP)
- Starport (Sp)
- Planetary Size (S)
- Atmosphere (A)
- Hydrosphere (H)
- Population (P)
- Government (G)
- Law Level (L)
- Tech Level (TL)
- PBG Sequence
- P: Pop Multipliers
- B: Belts
- G: Gas Giants
- TZ: Travel Zone
- COG Sequence
- Other System Data
- Universal World Profile (UWP)
References & Contributors (Sources)
- Marc Miller. Worlds and Adventures (Game Designers Workshop, 1977), 5, 9, 17, 19.Marc Miller, Robert Eaglestone, Don McKinney. Worlds and Adventures (Far Future Enterprises, 2019), 5, 9, 17, 19.
- J. Andrew Keith. Exotic Atmospheres (Game Designers Workshop, 1983), 1-16. (Special Supplement 2 from the periodical Journal of the Travellers' Aid Society 17)
- Joe Fugate. Grand Survey (Digest Group Publications, 1986), 19, 27-28, 34-35, 45.
- Marc Miller. Referee's Manual (Game Designers Workshop, 1987), 22.
- Geir Lanesskog. World Builder's Handbook (Mongoose Publishing, 2023), 64-68.Joe Fugate, J. Andrew Keith, Gary L. Thomas. World Builder's Handbook (Digest Group Publications, 1989), 64-68.
- Terrance McInnes, Dave Nilsen. World Tamer's Handbook (Game Designers Workshop, 1994), 11-17, 84, 90-91.
- Jon F. Zeigler. First In (Steve Jackson Games, 1999), 67-73.
- Paul Drye, Loren Wiseman, Jon F. Zeigler. Interstellar Wars (Steve Jackson Games, 2006), 125-6.
- Citation Missing - Mongoose Traveller Main Rulebook
- Marc Miller. T5 Core Rules (Far Future Enterprises, 2013), 409.
- Paul Elliott. The Universal World Profile (Zozer Games, 2016), 13-18.
- EXTERNAL LINK: Atmospheres at Freelance Traveller by Robert O'Connor
- Traveller Wiki Editorial Team
- Author & Contributor: Lord (Marquis) Jonathan Sherlock
- Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS
- Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science
- ↑ Marc Miller. Worlds and Adventures (Game Designers Workshop, 1977), 7.Marc Miller, Robert Eaglestone, Don McKinney. Worlds and Adventures (Far Future Enterprises, 2019), 7.
- ↑ J. Andrew Keith. Exotic Atmospheres (Game Designers Workshop, 1983), 3-4.
- ↑ Citation Missing - Mongoose Traveller Main Rulebook
- ↑ Citation Missing - Mongoose Traveller Main Rulebook
- ↑ Marc Miller. Worlds and Adventures (Game Designers Workshop, 1977), 9.Marc Miller, Robert Eaglestone, Don McKinney. Worlds and Adventures (Far Future Enterprises, 2019), 9.
- ↑ Paul Elliott. The Universal World Profile (Zozer Games, 2016), 13.
- ↑ Paul Elliott. The Universal World Profile (Zozer Games, 2016), 13.
- ↑ Paul Elliott. The Universal World Profile (Zozer Games, 2016), 13-14.