Editing Snowpiercer (section)

==Train sections and design==
Snowpiercer's 1001 cars are organized in different sections with their own unique features and design.

===Front section / Engine Car (C0001)===
[[The Engine]] Car has two levels. On the first level is a bio-locked<sup>[2]</sup> compartment, most likely containing the Engine. It is unknown how to enter the Engine, as it does not use [[Access Chip]] technology as other security measures aboard the train. 

Directly above the Engine is the train Control Room. While the train has automatic controls,<sup>[3]</sup> the Control room is usually manned by one pilot and one engineer during the day and a single pilot during the night. They have an unrestricted view and access to numerous control systems ranging from speed control to diagnostic panels that alert the pilot to potential issues ahead. The Control room also serves as an information hub for the entire train.<sup>[4]</sup> If the train detects a breach or mechanical malfunction, it will alert the Control room operators.

One of the systems that can be controlled from the Engine is separating sections of the train. However, this is a complicated step and requires two safety switches ([[J-Link]]s) to be disabled, one on either side of the separation while the Engine has two switches as well that require two operators to work. The switches must have keys turned in them simultaneously to be activated and then the switches themselves must be flipped at the same time to initiate separation of each end of the disconnected section of the train.

Behind the Control Room stands the Engineers living quarters with four bunks, a bathroom, and a bunch of closets. This compartment was once occupied by Melanie Cavill and Miles. 

=== First Class / C0002 > CXXX.===
First Class is located right after the Engine Car (C0001). This section is the most luxurious of the train, designed with great taste, precious materials, large windows, and a sense of grandeur to accommodate its guests.

The First Class [[Library Car]].

The [[The Aquarium|'''Aquarium and Sushi Bar Car''']] (C0011), known as the First Class Ocean, was one of the most awe-inspiring cars of the train. Most of the car was occupied by a large aquarium, crossed by an oval reinforced glass corridor. The aquarium was itself accessible from the second-floor and staff members were able to dive there with ease to farm seafood and fishes, providing a unique farm-to-table experience where sushi, sashimi, and rolls were made to order. Agriculture Officer [[Jinju Seong]] oversaw personally this car and its restaurant. During Layton's plot to take over the front section of ''Snowpiercer'', Bennett tasks Josie to breach the glass roof of the Aquarium Car. This results in the whole ocean inside to freeze solid, killing all the aquatic life. The expansion of the water then makes the whole car explode, effectively separating the front section of ''Snowpiercer'' from the rest of the train.

The '''[[The Hospitality Car|Hospitality Car]]''' is where the Head of Hospitality and Voice of the Train had her office and made her public announcements twice a day.

The '''[[1st Class Dining|Dining Car]]''' has been designed as Wilford's personal Dining Room where he would entertain his guests and friends. The table layout can serve about 32 guests per service. It can also double as an assembly room, especially during Tribunal sessions and meetings of the First Class Committee.

As per the '''Folgers' and the Schwartzs' [[1st Class Quarters|Quarters]]''', First Class Guests live with their families in double-decked private Guest Carriages. The main deck consists in a public corridor for passengers to cross the car. From this corridor, at each side of the carriage, an entrance leads to the lobby of the Guest Carriage. In between those two lobbies is a living room equipped with a gas chimney, bookcases, and large windows. On one side of the carriage stands a closet room that can double as a bedroom for the help. On the other side, a flight of stairs leads upstairs where the guests' bedrooms and bathroom en suite are located.

Other First-Class amenities include a Sauna Car and a Bowling Alley Car.

===Second Class / CXXXX > C0557===
Second Class is located middle train behind First Class. While it is still unclear where it begins, as per blueprints used by the First Class in ''[[These Are His Revolutions]],'' it is divided into four sections, and ends at the Night Car.

This section offers comfortable accommodation to its passengers. While materials remain elegant and windows large and numerous, the whole Second Class is designed to be more practical and cozy.

'''Second Class crew [[2nd Class Quarters|Quarters]]''' include Dr. Jinju Seong's and Dr. Pelton's compartments. Both are constituted by a large room with two windows, equipped with a desk and a bed, as well as pieces of furniture and decoration belonging to their occupant. The structure of the compartments hints at the fact that bathrooms might be shared (there is no door visible in the room). Official concept arts for Second Class Quarters describe them as "''designed with efficiency in mind''" and with a "''modular floorplan''". Besides, it is possible that families' Quarters are larger and include a bathroom.

Second Class has its own Clinic Car(s), equipped with a comfortable recovery room.

The twelve '''[[The Drawers|Drawers Cars]]''' (section 2.4, C0545-C0556) are located at the rear end of Second Class and house about 400 Drawers. They served as both an extrajudicial imprisonment and medical experiment facility. Should ''Snowpiercer'' society collapse or fail, the Drawers were to serve as a failsafe, where 400 pre-selected people would be put into suspended animation as the last resort to save humanity.

'''The [[Night Car]]''' (section 2.4, C0557) is the last car of Second Class. While [[Joseph Wilford|Mr. Wilford]] merely saw it as a decadent Art Deco brothel, Singer [[Miss Audrey]] saw its potential as a place to grieve together for what was left behind. Besides offering events and concerts featuring a rotating troupe of award-winning singers, actors, musicians, dancers, and entertainers for passengers of all classes, it also provided individual therapy sessions to remember the time before the Freeze and come to accept what was lost. As such, the Night Car has been both compared to Switzerland (a neutral Car in the middle of the train) and a bridge between Classes.

===Third Class / C0558 > C0997===
Third Class comprises all of the remainder cars past the Night Car, down-train, and makes up for half of the train length. Most of the carriages are one-deckers. As per blueprints used by Commander Grey when he planned on gassing Third Class, it is divided into at least three sections: 
*Section 3.1 could be mainly residential
*Section 3.2 could be mainly industrial and cargo
*Agriculture is part of Third Class section 3.3
Third Class begins mid-train once with a Jackboot station and '''[[Border Checkpoint Car]]''' that can be closed to limit circulation up-train.

====Residential Section (Third Class, section 3.1)====
Third Class section 3.1 might be a residential section. While Third Class house a workforce of around 1,700 people, it offers very small accommodations to its passengers, with low-grade material and an industrial look. Individual space is a rarity in Third Class as most cars are either Agriculture Cars or industrial and cargo cars. Most residential compartments might be located mid-train. If cars mid-train still have windows, the further you go down-train, the fewer windows there are. Those shared compartments might be similar in design to the Engineers compartment in the Engine Car: small and efficient.

As all Third Class residents work in three shifts of 8 hours, the '''Mess Hall Car''' is open all-around the clock and switches from serving drinks to foods depending on the shift and time of day.

The '''Education section''' includes a series of '''[[Classroom (C0355)|Classroom Cars]]''' and Utility Cars. One of them was used by Primary Teacher Mary Elizabeth Gillies. The bright and colorful car was mostly comprised of about a dozen desks for the pupils and was decorated by the children's works. After Andre Layton's fake capitulation at the end of the civil war, that Classroom Car is used by the Folgers and Commander Grey for the signing of the official surrender act. The rebels used the opportunity that most of the Jackboot forces would be concentrated within seven cars around the Classroom Car to detach them from Snowpiercer, leaving the army, some First Class passengers and Rebels prisoners to freeze to death.

The Third Class '''Clinic (W-3.1-C0561-C0565)''' is led by Dr. Pelton, is part of a small Medical Section that might include other medical cars. During the civil war in Third, it acted as a field hospital and rebel camp.

====Industrial and Storage Section (Third Class, section 3.2)====
Third Class section 3.2 might include industrial, storage, and Cargo areas. It might be where Food Processing and Papermaking are located. It seems like some '''Cargo Cars''' have been emptied over time and repurposed by Third Class residents, selling drinks, food and craft products, the '''[[The Chains|Chains]]''' where younger and more carefree Third Class residents live in a community setting.

This section might also house a series of '''Battery Cars,''' as it is stated that at the end of the civil war, at least 37 of them were out of service.

'''EVA Cars''' are dispatched all along the train. One of them (W-3.4-C0991) is located at the Tail. Another (W-3.1-C0570) is located midtrain. 

Jackboots and Brakemen represented over 175 people. While it is known that they are Third Class residents, it is still unclear where in Third Class the '''Jackboot Garrison Car(s)''' is located, while it is hinted the '''Brakemen Garrison Car(s)''' is located between Sanitation and the Tail.

====[[Agricultural Section|Agriculture Section]] (AG-SEC, Third Class, section 3.3)====
Agriculture is one of the most essential parts of the train, both in size and importance, as it's cultures and systems produce a variety of food and materials necessary for the survival of Snowpiercer's crew and passengers, and might also serve to scrub carbon dioxide from the atmosphere and produce oxygen. Melanie Caville said to Layton that there are 131 cars ''"just like this one"'' while standing in a Greenhouse Car, but it is unknown if she was referring to the whole AG-SEC or only Greenhouse Cars. It is also unclear if Food Processing is part of it.

'''Greenhouse Cars''' are large one-decker cars whose roof is a dome made out of reinforced glass and where crops are farmed on regular cycles using hydroponics, natural and artificial lights: 
*Berries (14 cycles/year), including Chili peppers, Grapes, Cherries and Strawberries
*Potatoes (7 cycles/year)
*Cocoa (6 cycles/year)
*Wheat (4 cycles/year)
*Rice (3 cycles/year)
*Sugarcane (2 cycles/year)
*Cotton (2 cycles/year)
*Lettuce, Carrots, Cucumbers and probably other vegetables
*Floridian oranges, Apples, Mangos, Avocados, Bananas, Grapefruits, Olives and probably other fruits
'''[[Cattle Car]]s''' (Pig Cars, Goat Cars, [[Poultry Car]]s, Sheep Cars) are one-decker cars with large windows on one side where animals are bred for their meat, milk, eggs, skin, feathers, methane, and manure... Snowpiercer livestock includes pigs, goat, poultry and sheep. It used to include cows too but an avalanche in the Cascade mountains led to the Cattle Car to be breached and its entire livestock to instantly freeze to death and go extinct seven years after departure.

'''Aquaculture Cars''' produces a variety of food and products such as fish and seafood. The water enriched by fish wastes also produces a natural fertilizer used within the hydroponics system. The First Class Aquarium and Sushi Bar Car might have been a high-end version of Aquaculture Cars and was directly under the supervision of Agriculture Officer Dr. Jinju Seong.

This section also includes its own '''Water Reservoir''' as stated by Jinju Seong when discussing with Bennett Knox and Melanie Cavill about the consequences of the bovine extinction event. An old '''Apiary Car''' was closed down after the bee colony collapsed, three years before the revolution, resulting in bees going extinct. Refrigeration Cars are where the crops and food are conserved after farming and before being processed and dispatched.

AG-SEC systems are intricately intertwined and create an artificial yet fragile ecosystem within the train. After the extinction of bovine cultures, Chief Engineer Melanie Cavill had to think of another way to produce necessary methane the cows used to produce (goat farts). When Agriculture Officer Jinju Seong was tasked with devising a way for equal calories between classes, she angrily noted that lootings of AG-SEC Greenhouse Cars, Refrigeration Cars, and Aquaculture Cars at the end of the civil war led to crops destruction and food shortage.

==== Sanitation Section====
Sanitation is a necessary yet despised section of the train, located between Agriculture and the Jackboots Garrison Car at the Tail. This section might play a key role in the train systems. The industrial and windowless '''Sanitation Cars''' are equipped with compost units that transform organic wastes (manures, corpses...) into fertilizer using bugs and worms. This section might also include greywater filtration and treatment systems.

Due to the strong smells, working in Sanitation is not very well considered among Ticketed Passengers, to such extent that a team of three Tail residents is tasked with daily 8-hours-long shifts there.

===The Tail / C0998 > C1001===
The Tail section of Snowpiercer, located at the very rear of the train, mostly includes '''[[Cargo Car (Tail)|Cargo Cars]]'''. When Snowpiercer left Chicago, that section was boarded by stowaways who overpowered the Jackboots protecting the train. They lived in the dark of the Tail for almost seven years.

A '''[[Bio-Security Car]] (C0998)''' supposedly existed within the Tail to prevent any contamination from one train to the other but was mostly used to prevent Tailie residents from infecting regular passengers. The '''[[Docking Car (Snowpiercer)|Docking Car]]''' '''(C1001)''' had been designed to allow a supply train to board her in mid-voyage. At the end of that Car is a huge circular vault door that can be opened to allow supplies to be transferred from one train to the other.