Republic Fleet Bastion Module
FactionSiege ModulesRepublic Fleet 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
1.35b ISK
90d Avg
1.51b ISK
Volume
200 m³
Base Price
5.00m ISK
Jita Market (90d)
Latest Price (2026-05-06)
1.35b ISK
90d Average
1.51b ISK
90d High
2.20b ISK
90d Low
1.06b ISK
Avg Daily Volume
5
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
Required Skills
Attributes
Structure HP999,999
Velocity Modifier-100.0%
Powergrid Usage80 MW
CPU Usage10 tf
Cycle Time60.0s
Armor EM Resist40.0%
Armor Thermal Resist40.0%
Armor Kinetic Resist40.0%
Armor Explosive Resist40.0%
Shield EM Resist40.0%
Shield Thermal Resist40.0%
Shield Kinetic Resist40.0%
Shield Explosive Resist40.0%
Reprocessing Materials
Properties
Type ID94008
Group ID515
Category ID7
Mass1 kg
Volume200 m³
Portion Size1
Meta Level8
Tech Level1
PublishedYes
Recent Prices (Jita)
DatePriceVolume
2026-05-061.35b8
2026-05-051.64b4
2026-05-041.68b3
2026-05-031.24b9
2026-05-021.06b1
2026-05-012.12b4