Imperial Navy Bastion Module
FactionSiege ModulesImperial Navy Bastion Module — Faction Siege Module (Module) — EVE Online item
An electronic interface designed to augment and enhance a marauder's siege abilities. Through a series of electromagnetic polarity field shifts, the bastion module diverts energy from the ship's propulsion and warp systems to lend additional power to its defensive and offensive capabilities.
This results in a greatly increased rate of defensive self-sustenance and a boost to the ship's overall damage resistances. It also extends the reach of all the vessel's weapon systems and their rate of fire, allowing it to engage targets at farther ranges.
As a side effect of the ionic field created by the bastion module, beneficial remote repair and capacitor transfer effects are ineffective against the fitted ship while the module is active.
In addition, the lack of power to mobility subsystems means that neither standard propulsion nor warp travel are available to the ship, nor is it allowed to dock or jump until out of bastion mode.
Note: Only one bastion module can be fitted to a marauder-class ship. The increased shield boosting and armor repairing gained from the bastion module is subject to a stacking penalty when used with other modules that affect the same attribute on the ship.
Rapid Heavy Missile Launchers are not affected by bastion modules.
This results in a greatly increased rate of defensive self-sustenance and a boost to the ship's overall damage resistances. It also extends the reach of all the vessel's weapon systems and their rate of fire, allowing it to engage targets at farther ranges.
As a side effect of the ionic field created by the bastion module, beneficial remote repair and capacitor transfer effects are ineffective against the fitted ship while the module is active.
In addition, the lack of power to mobility subsystems means that neither standard propulsion nor warp travel are available to the ship, nor is it allowed to dock or jump until out of bastion mode.
Note: Only one bastion module can be fitted to a marauder-class ship. The increased shield boosting and armor repairing gained from the bastion module is subject to a stacking penalty when used with other modules that affect the same attribute on the ship.
Rapid Heavy Missile Launchers are not affected by bastion modules.
Jita Price
1.12b ISK
90d Avg
1.08b ISK
Volume
200 m³
Base Price
5.00m ISK
Jita Market (90d)
Latest Price (2026-06-20)
1.12b ISK
90d Average
1.08b ISK
90d High
3.30b ISK
90d Low
734.00m ISK
Avg Daily Volume
15
Variations(5)
Imperial Navy Bastion Module
Faction
Republic Fleet Bastion Module
Faction
Federation Navy Bastion Module
Faction
Caldari Navy Bastion Module
Faction
Bastion Module I
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3.87bRequired Skills
Attributes
Structure HP999,999
Velocity Modifier-100.0%
Powergrid Usage80 MW
CPU Usage10 tf
Cycle Time60.0s
Armor EM Resist20.0%
Armor Thermal Resist20.0%
Armor Kinetic Resist20.0%
Armor Explosive Resist20.0%
Shield EM Resist20.0%
Shield Thermal Resist20.0%
Shield Kinetic Resist20.0%
Shield Explosive Resist20.0%
Reprocessing Materials
Properties
Type ID93999
Group ID515
Category ID7
Mass1 kg
Volume200 m³
Portion Size1
Meta Level8
Tech Level1
PublishedYes
Recent Prices (Jita)
DatePriceVolume
2026-06-201.12b3
2026-06-191.17b9
2026-06-181.21b5
2026-06-161.26b8
2026-06-151.23b8
2026-06-141.21b11
2026-06-131.11b10
2026-06-121.12b16
2026-06-111.03b18
2026-06-10928.70m13
2026-06-09922.71m18
2026-06-08913.37m3
2026-06-07929.91m9
2026-06-06913.70m15
2026-06-05897.74m19
2026-06-04892.02m13
2026-06-03897.09m20
2026-06-02897.33m28
2026-06-01892.41m30
2026-05-31896.40m55
2026-05-30898.35m28
2026-05-29889.57m34
2026-05-28920.17m37
2026-05-27935.22m20
2026-05-26929.51m15
2026-05-25947.55m12
2026-05-24917.00m16
2026-05-23893.77m14
2026-05-22877.03m14
2026-05-21911.59m11