Astra Telepathica Survey.
Planet Odium, Hadal system, Torvum Sector, Ultima Segmentum.
Conducted:
3.111.500M41 Macragge calendar.
1.142.600M41 Primary Terran Calendar.
1.142.700M42 Terran Primary Calendar.
1.157.700M39 Primary Terran Calendar. Polar Hives
1.142.249M40 Ordo Chronos Calendar. *
*Current version by Ordo Chronos Inquisitorial Conclave Edict issues on:
1.142.521M41 Primary Terran Calendar.
1.142.651M42 Terran Primary Calendar.
*Previous Version by Ordo Chronos Inquisitorial Conclave Edict was:
1.142.245M40 Ordo Chronos Calendar.
Issued on:
1.114.517M41 Primary Terran Calendar.
1.142.646M42 Terran Primary Calendar.
By command of the Master of the Adeptus Astra Telepathica, this survey has been made of the Hadal System to prepare future Astra Telepathica Personnel.
History of the Hadal System.
The Hadal system is located within the Torvum deeps, in an area of The Leaves where only ships with navigators, or following a pilot ship with one, can traverse the warp. It is far from the war with the Tergragh, but it is often involved as a supply station for ships heading towards the Melded Worlds.
During the Golden Age of Technology, the city of Nautilus was founded at the bottom of the deepest trench, although the origins for the city are unknown. The ancient builders constructed The Rift Wall, the great fortified exterior of Nautilus, which controls access to the underground city.
When civilization fell and xenos empires slaughtered a broken human civilization, Odium called out into the stars, calling for the fragments of humanity's federation to rally in their system, to rally and regroup. For centuries, ships limped into the Hadal system, fleeing the collapse of human civilization, the tide only lessening as the warp storms intensified.
Nautilus's government became a military junta established by a 'Federation General Ataxia', which then over time morphed into a military aristocracy that ruled the world, before becoming a regular aristocracy.
Then the Tergragh invaded the system. Their warfleet bested the remaining human warships, leading to the abandonment of the orbitals and the floating cities. The ancestors of the Voidborn then fled into the outer system, while the people who would become the Nautillians retreated below the Radiotrophic belt.
The Tergragh attempted to build their own floating city and to assault Nautilus, fearing it could become a rallying point for human slaves. But the people of Nautilus fought back with their submarines and superior understanding of ocean warfare. In the end, the Tergragh would downgrade their garrisons before posting monitoring stations and departing.
Below the Radiotrophic Belt, the people of Odium built a complicated civilization well-suited to harvesting whatever its people needed from the oceans. Learning to thrive in an inhospitable world. When the Imperium discovered Odium, they learned of them only through the stories of the Voidborn, who'd maintained records of the city and their ancestors.
The first Imperials to meet the Nautillians were Mechanicus Explorators that searched for a lost city mentioned in ancient records. These were immediately fired upon by the automated defences.
A retaliatory strike to bring the world into compliance was launched, and then immediately ended when the fleet realised they had no force that could actually reach Nautilus short of Exterminatus. Imperial underwater forces were only equipped for deployments up to ten kilometres deep, and the MK2 Adeptus Astartes Power Armour of the early crusade was not rated for the depth.
In the end, sheer practicality ensured that the people of Nautilus were slowly lured out of their hole through the Explorators leaving caches of gifts and long-ranged communications. After news that humanity was in the process of reclaiming the stars finally filtered down to Nautilus, popular support ensured that the High General agreed to join the Imperium.
Nautilus has ever since been a member of the Imperium, slowly adapting to the Imperium through ecclesiarchy missionaries and Adeptus Mechanicus magi, but there still exists a distance between the Two that has yet to be bridged. The difficulty of reaching the city has ensured that assignments are generally reserved for lifetime appointments.
Thalassa: The Gas Giant of the Hadal system lies beyond the radiation of the Black Hole and lies in a great asteroid belt that is all that remains of the original star system. Among these shattered worlds, the voidborn have built their civilization.
The Gravitic Sons:
The Brotherhood of this system, is a confederation of democratic stations and spacecraft who select a Governor to be their representative to the Administratum. The brotherhood, although spread out, has a traditional home in the form of Port Vurn.
Port Vurn is an Ohnyl Colony, two giant spinning cylinders connected by a central core within the L1 Lagrange point of Thalassa. Each cylinder is ten kilometres across and forty kilometres long, and maintains a comfortable spin-gravity of 0.5g.
A great shipbuilding industry exists around Port Vurn. The majority of ships built in the system are from a pair of shipyards that are built upward and downwards from the large core of the central axis of the rotating drums, each as long as the actual drums and containing the space-based industry needed to keep the voidborn civilization prosperous. It is in the habitation quarters of these static cylinders where most of the voidborn live, preferring the zero-gravity.
Port Vurn's cylinders have long since been completely rebuilt, but are supposedly made from the original colony ships that colonised this part of the Torvum sector. They hold great cultural significance to the Voidborn. To live within the grasslands of these cylinders, and to walk the ancient homes of their ancestors, is considered a humbling experience.
Defiance of Oblivion:
A formidable star fortress which serves as an important recruitment center for the Imperial Navy. Half the Star-Fort is set aside for the use of the Imperial Navy, with the remainder controlled by the Voidborn Brotherhood, the Gravitic Sons.
Contains:
Naval Base Torvum Deeps:
A massive sprawling collection of internal hangars and repair facilities for the fleet that defends the Hadal system. Large enough to accommodate the whole Torvum Deeps sub-sector fleet if need be.
-Currently empty
Naval Base Hadal:
Odium maintains a large system defence fleet which is so large that the Imperial Navy does not generally keep a large garrison within the system, allowing them to free up ships needed on the fronts. This has ensured that there is actually a healthy rapport between the System Defence Navy and the Imperial Navy.
-The system defence navy consists of four cruisers and sixteen escorts. They are primarily manned by a combination of Voidborn and planetary inhabitants, with the lower ratings being either hired from the lower hives of Nautilus, or impressed if needed.
Odium Naval Academy:
-This academy processes thousands of aspiring Voidborn each day, finding them positions either as officers, or as senior technicians. While the navy may impress masses of underhivers to do menial labour, the voidborn are destined only for prestigious voluntary service where their skills are most useful.
Odium orbital Plate:
The Orbital plate connected to the planetary tether is used to dock the constant influx of ships arriving to trade with the planet. The tether has four cars, one arriving and one departing every twelve hours. It is a vital artery of trade for the planet and the overall system and is therefore heavily patrolled and defended by the system defence fleet, and in the case an invading force takes control of the void, it is set to detonate and deny any would-be invaders easy access to the planet.
To defend the planet from assault, the people of Odium have constructed a series of defensive measures.
Orbital scanning towers:
These towers, each ten kilometres long and just twenty metres across, serve as Nautilus's eyes and ears.
The towers pass through the Radiotrophic belts, allowing accurate augur information to be captured by the sensoriums and augur stations in their tips.
A network of eleven of these move in patterns through Odium's oceans, giving the defenders of Nautilus a permanent view of their system.
Heavy defence batteries:
These mobile batteries are each a square kilometre across and a hundred metres high. The free-floating platforms are submerged a kilometre below the layers of radiotrophic algae and plankton that cover the ocean to hide them from detection by enemy scouts preparing for planetary assaults.
When the planet is threatened, the platforms will move into positions and rapidly surface and open their great metal irises, revealing anti-orbital laser cannons that dump heat directly into the ocean, and have frigate-grade void shields. These can comfortably take down frigates and even cruisers.
There are three platforms like this, always located in a pattern around Nautilus.
Anti-Orbital Missiles:
A design long known by the Mechanicus but rarely used. These missiles are buried in silos that have either been sunk down to the planet's floor, or embedded into the rock itself.
When the planet is attacked, the missiles are released to float to the surface. And upon righting themselves, each of the missiles, each a hundred metres long, with servitors integrated into the machines will aim themselves towards their target by adjusting the distribution of their fuel tanks and gyroscopic stabilisation.
The main missiles then ignite their fusion drives and head towards their target with the speed of a voidwar torpedo. The launch throws up a great cloud of radioactive mist, which serves to blind enemy augur systems, even as the missile begins shedding the plates protecting it from the salt water.
Built for speed and evasion, the missiles are eighty percent fusion engine and fuel and can hit a target in orbit within twenty seconds of launching, the heat turning the missile into a spear of molten metal containing a fusion warhead able to gut a large troop carrier.
Odium has ten missile silos hidden around Nautilus, each containing twenty manoeuvring pods containing six missiles each. Missiles are released from the pod and allowed to float upward separately, seeding the ocean for a sudden simultaneous launch.
In the unlikely event an enemy lands on Odium, the world has to be protected.
Deploying underwater infantry on Odium:
A world as inhospitable to life as Odium, brings new challenges for the defenders of mankind. However, this world's soldiers have overcome the challenge and have become masters at underwater warfare.
Infantry on Odium, when required to patrol the perimeter of bases for pirates or wildlife, will do so wearing an extreme pressure suit with integrated jets, controlled via a Mind Impulse unit. Submarine Infantry or 'Submen' can manoeuvre using mental commands while fighting.
All military units deploy their infantry either as free-moving infantry in armoured deepsuits , or with open-topped submarines able to carry anything from a fireteam to a full platoon. These are supported by sealed submarines of various sizes ranging from ones the size of a car, to ones the size of a landspeeder. Equipment varies with crafts able to take various loadouts, from anti-kraken patrols, to anti-personnel loadouts.
Odium Planetary Defence force:
The Odium PDF is small, primarily focused on maintaining order and civil-defence within the depths of Nautilus. The hive city has a standing army of 10 million PDF members, their numbers constrained by their ability to actually move this army around. This does not count the planetary law enforcement forces, which number 100 million and can be pressed into service to defend the city. Most of this army is maintained for the sake of meeting Administratum standards in the event a tithe of guardsman is expected.
The PDF also operates a hundred war-submarines. Large heavily armoured submarines equipped with missile pods and torpedo tubes with a variety of warheads. They can fire missiles if the submarines surface, or launch torpedoes with explosive warheads for hardened targets, or flechette cases for shredding through flocks of divers.
Twenty dedicated carrier submarines each capable of deploying three thousand soldiers are used in the event one of Nautilus's many colonies requires the deployment of military force. As this is more than the population of most outposts, it has proven more than sufficient in dealing with revolts.
The Torvum Tribunes:
Ten regiments of the Torvum Tribunes are based in Nautilus, and alongside serving as the Planetary Governor's personal protection force, they are also trained to operate deep-sea pressure suits, and can be deployed anywhere on the planet using their submarine carriers.
They have ten carrier-submarines, each able to carry the entire regiment into battle. A kilometre long each, these carriers both have enough firepower to drive off a small kraken, and can deploy their regiment into the water.
Two of the carrier submarines do not carry troops, and are instead equipped with large torpedo bays and the ability to deploy smaller fighter-submarines.
In the event of internal dissent, the Torvum Tribunes maintain a motor pool and regular artillery for deployment in the vast underground spaces of Odium.
Baseline humanity:
The humans on Odium are a nearly distinct subset of humanity, and would, if not for immigration from offworld, have become an abhuman species already.
Their average height is one metre seventy one centimetres, and they are broad and stocky due to the world's slightly stronger 1.2 G's of gravity. Their eyesight is markedly worse than the Ultima Segmentum Standard Human Phenotype, and they are sensitive to bright light. Some remote populations within the Hive City have become legally blind, but have compensated for it with excellent hearing, smell, and rudimentary electrosensitivity.
Standard Astra Telepathica Psyker Aptitude Tests have confirmed the population of having an above average amount of telekinetics and pyromancers. Divinatory talent is rare among Odium's Psykers for reasons unknown.
League of Votann:
A population the Adeptus Astra Telepathica has identified as "Kin" from the Leagues of Votann, a recidivist abhuman civilization, have spent some time within the Hadal system. They maintain their own mining operations in remote parts of the Abyssal Plane and are known to trade clandestinely with the voidborn and the planetary authorities. Their efforts are migratory, constantly moving to avoid discovery but a base has been rumoured to exist out in the void.
Nautilus Ogyns:
Nautilus has a large underclass of Ogryns that work the great mines that extend from the Rift Wall deep beneath the earth. These mines produce most of the raw materials used by the city for internal expansion, and to expand the much needed living space. These Ogryns are reliable workers, and exploitation is rare as they're known for quickly 'clapping' (local slang for death by Ogryn) those who insult or abuse them.
Before the world was made a fief of the Adeptus Astra Telepathica, Odium was ruled by a planetary governor that was a descendant of a long line of military dictators. This ruling class was classed as nobility in Administratum records upon the planet joining the Imperium, and transitioned into this role. The planet is ruled by a large military elite and a series of extensive Ministries that are integrated into a planetary bureaucracy.
The previous Planetary Governor was discovered to have bribed Administratum officials and passed off substandard production as part of the Imperial Tithe, while embezzling funds. He was subsequently publicly executed by the Adeptus Arbites, and a new ruler was needed. The Astra Telepathica successfully negotiated with the Administratum for the world to be transferred to them as a fief.
The Various organisations of the Adeptus Terra operate in full force upon Odium, working without deviations from standard Adepta operations. Only a few groups deviate.
Navigator Houses:
The three Navigator Houses have their own colonies on Odium within the Abyssal Plane. What they do is unknown, but the colonies were legally acquired and can not be taken away from them.
Adeptus Mechanicus:
Nautilus has a large Adeptus Mechanicus presence, and they largely recruit and trains locals who are inducted into the priesthood. The city has a healthy relationship with the Adeptus Mechanicus, with it diligently ensuring that all the systems keeping life upon the world possible are kept operational.
The economy of Odium is built on the processing of the planet's immense natural bounty, and on exporting its advanced technology. The city has maintained a far above average understanding of Dark Age of Technology metallurgical knowledge and gravitic manipulation. The same application of gravity manipulation and advanced material sciences that allows for the creation of cities on the ocean floor, allows for the creation of advanced emergency habs and bases for the Adeptus Terra.
The economy of Odium is connected to offworld trade through connections with sector-spanning trade cartels, resource conglomerates, and Voidborn Brotherhoods, with many having a presence on the planet. The internal economy is slightly more varied, with each of the essentials of day to day life provided by competing mercantile interests especially with the middle sections of the hive having a large middle class. Most trades are represented by one or multiple Guilds, who ensure that anyone with a skilled trade, can be a prosperous citizen by Imperial standards.
Planetary Tithes:
Nautilus meets its tithe obligations primarily through providing the Imperium with prefabricated colonisation habitats. Deep sea mining equipment. Submarines. And occasional Imperial Guard tithings if the Guard requires it.
Mesa Waystations.
Built by the transport guilds, maintained by the Adeptus Mechanicus, and overseen by the Administratum. These waystations started as domed colonies lowered from the surface by Mechanicus bulk landers, followed by a slow but steady entrenching process where an underground base is dug to store the materials. Most waystations are connected to the Maglev lines, although many also have submarine docks.
Cargo containers with imports and with exports are sorted and catalogued beforehand into frames and packages, ensuring that the handover of materials is a smooth and painless process.
Maglev Lines and pipelines:
Like all things, the maglev lines need constant checks and repairs, which is why small habitation domes are scattered along the lines from which Tech-Priests, Tech-Acolytes, and their Technomat servants maintain the lines of supply that tie the world to the Imperium.
A popular form of goods conveyance on Odium, although reserved for hardy materials, is the use of large pipelines. These are primarily used to transport mined ores in slush form, or rendered biomass for reconstitution in Nautilus. These pipelines go through at least twenty-four separate airlock failsafes, each of which reinforced with gravitic fields which can hold off the ocean if the airlock is broken.
Nautilus Colonies:
Nautilus alone can not provide for the city's needs, and so the city has established a network of colonies. These colonies range from domed cities, to underground domains connected to Nautilus through underground maglev lines.
Alongside the many mining colonies, there are also agricultural and fishing colonies spread across half of the world's surface, either connected to Nautilus through pipelines and maglevs if they are close enough, or with cargo submarines. Large cultivated expanses of kelp forests and managed stretches of the abyssal plane where the agricultural and fishing colonies operate provide most of the influx of nutrients into the hive's Bio-recycling systems. Like most of the world's colonies, most workers are involved in managing and operating large groups of servitors.
The Nautilus Rift:
The home of most of the planet's populations. It's the nerve centre of the planet and where all imperial organisations build their Headquarters. The lips of the Rift are covered with domed factories processing the resources of the colony before transferring their goods onwards into Nautilus itself.
Across from the southern Rift Wall, in which the city of Nautilus is built, the natural rock of the northern rock face has been turned into storage space, habitats, and the vast bulk of the city's docks. There are also large habitat quarters here, largely intended for offworlders visiting Nautilus, with many hotels and entertainment districts being located here.
The City of Nautilus:
Nautilus as a city is laid out in a structure that ensures one's importance increases the closer they are to the Rift Wall, and to the bottom of the Rift, where a geothermal glow provides a rare source of natural light.
The Rift Wall is a great framework of ancient metal that has remained undamaged from the elements, and which no material known to the Imperium is able to breach. The Old City, the part of Nautilus built during the Dark Age of Technology, has retained a spark of the original beauty it once possessed, necessity has ensured that it has not fallen to squalor. Space here is at a premium, as the Old City was originally only built for up to a million inhabitants. This part of Nautilus is directly built into the Rift Wall's superstructure. Old airlocks have been used as starting points for new developments, mostly palaces for the rich, giving the Rift Wall a layer of strata built on top of the untarnished silver metal of the original construction.
The High-Middle, is the expansion of Nautilus made during the early Age of Strife, consisting of large habitats burrowed into the rock for the refugees moving into the city. Closer to the ocean floor, with only five kilometres of structurally reinforced resin-infused and gravity-reinforced rock between it and the sea floor. It is built from the same material as the Rift Wall, although much more densely packed and populated. It is the home of the city's artisans and skilled labour force, with the Ministries operating from here, although their Headquarters are in the Low Middle.
The Low-Middle is the administrative and bureaucratic heart of Nautilus, built when it became clear that humanity could no longer just hide on the world, and had to create an enduring civilization. It is here that the city's bureaucracy, Adeptus Terra officers, offworld trade organisations, and the City Ministries are based. The Ministries are the organisations within Nautilus that ensure the city is kept operational. This includes the Water Ministry, the Lighting Ministry, the Corpse Ministry. These Ministries ensure that their areas of responsibility are maintained to avoid the draconian punishments.
The Deep Hive is the name for the large square uniformly constructed self-sufficient habitation segments that each house up to a hundred million humans in relatively close confines, connected through underground rail lines. Each of these hab blocks is deeper than the other, with many being their own micro-states.
The Pit is the name for the hundreds of old mining tunnels and caverns that have been excavated over the years and turned into living space for the city's massive population. This part of the city goes far below ground, with life being found in anything from small outposts to even cities with some measure of order, here the habitation vary from homes made of metal, to caverns carved from the rock, whose indentured inhabitants have spent generations mining a specific vein for a mining guild that no longer exists.
Nautilus has long given up on fully mapping out the tunnels.
And that's the last worldbuilding done. I hope you have enjoyed reading it as much as I have in writing it.