Ship Environmental Control
- The smallest breakdown of vital ship systems or damage from combat may quickly extinguish the fragile life within a ship's hull.
- Many Terrans like to call it air conditioning, but it's probably more than that if we are to be technical.
- It is a kind of Ship Equipment.
- It may form an element of a world's infrastructure.
Interior Conditions: Normal conditions generally approximate those of a livable world surface for conventional life.  Ship controls and systems may be adjusted to the comfort specifications of selected sophont species. On large ships with very diverse crews, an unhappy medium may need to be decided upon by the ship's captain. Most large ships contain grumbling crews arguing over their "ideal" life support settings. 
Computer Control Standards
Computer Controls: In almost all cases where the ship's computer can control a given ship function (gravity, doors, etc.), orders fed in at the central bridge computer take precedence over those fed in at local controls. Only if the computer is inoperative will a computer override be ineffective. Some ships have been known to be built with a different system set-up, but this arrangement is commonplace on most vessels within Charted Space. 
Light: Most areas are fully and comfortably lit. The intensity of lighting can be varied by computer instructions or from the environment control panel located in compartments near each door. Cargo holds, maintenance ducts, and similar areas which are rarely visited are often poorly lit. Some areas, such as the bridge, may be lit with red light to preserve the night vision of personnel on watch.
Atmosphere: The interior of the ship is normally pressurized to standard atmospheric conditions with an oxygen-nitrogen mix. Air locks may be in vacuum, or fully pressurized, depending on ship procedures and individual use. Air locks take up to two minutes to cycle. Individual cabins are not normally pressure-tight, but can be converted to allow use by individuals accustomed to unusual atmospheric pressure or composition. Such conversion costs Cr1,000.00 per compartment and takes about one week to convert.
Temperature: The interior of a normal ship is kept at approximately 25 degrees Celcius; a humidity level comfortable for human passengers is assumed. Again, cabins may be individually converted to allow unusual temperature-humidity combinations to better accommodate non-human occupants.
Gravity: On most ships, grav plates are built into the deck flooring. These plates provide a constant artificial gravity field. Acceleration compensators are also usually installed to negate the effects of high acceleration and lateral G forces while maneuvering. Passengers aboard a ship would be unable to tell whether they were moving through space or grounded on a planet unless they could see a viewport or screen.
The grav plates installed in each compartment can be controlled from the ship's computer or from the room's environment panel. Gravity can ordinarily be set between 0.1-G and 2.0-G, to accommodate individual preferences.
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