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Imperial Fleet

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Seal of the Imperial Fleet

The Imperial Fleet is controlled by the Adeptus Terra and includes almost every ship in the Imperium. The Imperial Fleet is divided into three distinct branches - the Warfleets of the Imperial Navy, the Merchant Fleets and the Civil fleets.[1a] The Navis Nobilite also fall under its administration.[6] The few vessels that are not part of the Imperial Fleet instead belong to either the Adeptus Mechanicus, the Space Marines, the Inquisition, or a small number of honoured and ancient merchant families.[3] Administratively, the Imperial Fleets fall under the control of the Administratum.[6]

An Imperial Warfleet



The Imperial fleets are arranged around the five Segmentae Majoris that comprise the Imperium, and are based at the five Segmentum Fortresses.

Fleet Headquarters

Each Segmentum has its own merchant, civil and war fleets - for example, the Warfleet Solar is the warfleet of the Segmentum Solar, the Merchant Pacificus is the merchant fleet of the Segmentum Pacificus and so on.[2a]

Imperial Navy Warfleets

Main article: Imperial Navy

The Warfleets of the Imperial Navy are based around the five Segmentum Fortress planets.[1a] From these worlds the fleets are organised and sent to guard the various sectors and subsectors of that region.[1b] Each fleet is comprised of a wide array of different types of ship.

Merchant Fleet

Main article: Merchant Fleet

The combined merchant fleets compose almost 90% of all the interstellar spacecraft in the Imperium.[1a]

Civil Fleet

Main article: Civil fleets

The civil fleets contain privately-owned interstellar craft operating along routes licensed by the fleet authorities.[1a]

Fleets of other Imperial Organisations

Space Marine Fleets

Main article: Space Marine Fleet

Each Space Marine Chapter maintains its' own Battlefleet. Whilst they often fight in concert with other Imperial forces, each Chapter-Fleet is an autonomous organisation.[4]

Adeptus Mechanicus Fleets

Main article: Explorator Fleet

The Adeptus Mechanicus have at their disposal a large fleet of starships. These fleets are often dispatched to seek out lost archeotech and follow rumours of STC technology.[4]

Rogue Traders

Rogue Traders usually have access to their own vessels, sometimes even small fleets.


Inquisitorial Black Ship

Whilst the inquisition are able to requisition the ships of other Imperial organisations, they also maintain vessels of their own.

Adeptus Astra Telepathica

League of Blackships - consisting of a substantial fleet charged with collecting and transporting psykers from across the galaxy to Terra.

Adeptus Arbites

The Arbites also maintain a small fleet of patrol craft and counter-insurgency vessels, most notably among these the Punisher Class Strike Cruiser. The Arbites fleet also operates logistical vessels, transports, and other support craft.[7]

Adeptus Ministorum

The Ecclesiarchy operates its own exclusive naval vessels such as Missionary Ships.[8] In addition, the Adepta Sororitas have their own warships such as Dauntless Class Light Cruisers.[9]

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