The Navis Imperialis, known in Low Gothic simply as the Imperial Navy, is one of the two great armed forces upon which the Imperium's survival rests. Where the Astra Militarum holds the ground, the Navy holds the void, commanding the immense fleets of warships that keep order between the stars, break the enemies of Mankind in the dark, and carry the Emperor's armies to wars a galaxy apart. Through its Aeronautica Imperialis branch it also rules the skies above the battlefield, lending wings to the ground campaigns of the Guard.
So vast an institution could not be governed as a whole, and so the Navy is divided among the five great Segmentae Majoris of the Imperium. Each is served by a battlefleet based upon a colossal orbital Segmentum Fortress, the Ring of Iron at Mars for the Segmentum Solar, Hydraphur for Pacificus, Cypra Mundi for Obscurus, Bakka for Tempestus, and Kar Duniash for Ultima, and each is answerable to one of the five Lord High Admirals, of whom the master of Segmentum Solar is reckoned first in seniority. In practice it is the smaller sector battlefleets, of perhaps fifty to seventy-five vessels apiece, that carry out the Navy's daily work.
That work is without end. Its ships patrol the space lanes and shield merchant convoys from pirate and xenos raiders; they escort and deliver the regiments of the Astra Militarum; they hang in orbit to rain fire upon planetary foes; and they lend their strength to the exploration fleets that push into the unknown. From nimble escorts to city-sized battleships, the vessels of the Imperial Navy are the sinews that hold ten thousand scattered worlds together against a hostile galaxy.
Imperial Agents
Order of battle
The Imperial Navy field the units of the Imperial Agents — a detachment from the roster:
Kindred formations
Other Imperial Agents formations
Adeptus ArbitesThe Imperium's iron-handed galactic lawmen, judge, jury and executioner in a single armoured figure, upholding the Lex Imperialis across ten thousand worlds.
Officio AssassinorumThe Officio Assassinorum is the Imperium's institution of sanctioned murder, maintaining secret Temples where killers are forged into living weapons. Each Temple perfects a distinct lethal art: the impossible sniper shot, the perfect infiltration, the berserk slaughter, the anti-psychic horror. When the highest powers of the Imperium require a target erased, they turn to these silent executioners, whose marks almost never survive.
Rogue TradersPrivateer-explorers bearing the ancient Warrant of Trade, licensed to trade, conquer and treat with aliens beyond the Imperium's edge in the Emperor's name.
Sisters of SilenceThe Sisters of Silence are an ancient order of soulless women, warriors whose very presence is poison to psykers and daemons alike. Born as Untouchables, they render their oaths without a single word, wielding flame and blade alongside an aura of null that smothers sorcery. They serve as jailers and executioners of the Imperium's most dangerous witches, and their arrival heralds the hunt for a psyker of terrible power.
The InquisitionThe Inquisition is the Imperium's ultimate authority, a shadowed order that answers to none save the Golden Throne. Its Inquisitors hunt heresy, daemon, and alien alike, wielding the power to command fleets, judge worlds, and condemn the corrupt to fire. Divided among great Ordos, each dedicated to a different existential threat, its members walk a razor's edge between salvation and damnation in defence of Mankind.