Resistance and impedance

Electronic warfare resistance and remote assistance impedance comes in many shapes and forms, some through innate ship bonuses or tactical modes, others through special modules. It is an attribute that reduces the effectiveness of electronic warfare and remote assistance modules.

Resistances and impedances

On a basic level, the difference between resistances and impedances are that resistances help you by making hostile effects (like electronic warfare) less effective, while impedances make friendly (such as remote assistance) effects less effective.

There are a variety of attributes that affects the effectiveness of electronic warfare and remote assistance.

Type	Group	Effect
Electronic warfare	Sensor Dampener Resistance Sensor Warfare Resistance	Reduces the effect of hostile Remote Sensor Dampeners.
Remote assistance	Remote Assistance Impedance  Remote Electronic Assistance Impedance	Reduces the effect of Remote Sensor Boosters and Remote Tracking Computers.
Electronic warfare	Weapon Disruption Resistance	Reduces the penalty from Weapon Disruption .
Remote assistance	Remote Repair Impedance Remote Logistics Impedance	Reduces the repaired amount from Remote Hull Repairs, Remote Armor Repairs and Remote Shield Boosters.
Electronic warfare	ECM Resistance	Additional chance to avoid being affected by ECM Jamming
Electronic warfare	Stasis Webifier Resistance	Reduces the slowdown effect of hostile Stasis Webifiers.
Command Burst	Electronic Hardening	Reduces the effect of hostile Remote Sensor Dampeners and Weapon Disruption .
Electronic warfare	Capacitor Warfare Resistance	Reduces the capacitor drained by hostile Energy Neutralizers and Energy Vampires.

Examples

Below are some examples of ships, modules or scripts with such resistances and impedances:

The Confessor and other tactical destroyers have the information in the Traits tab as it's not always applied to the ship depending on their tactical mode.

For ships like the Avatar and other titans, the effect is always there and can also be found in the Attributes tab.

Modules like the Siege Module II and Triage Module II also apply certain bonuses and drawbacks in the form of resistances and impedances, which you can seen under the Attributes tab.

The Electronic Hardening Charge (used in Information Command Burst modules) will not only boost your sensor strength, but also give the recipient a moderate electronic warfare resistance to remote sensor dampening and weapon disruption.

Understanding the values

As with many bonuses it can sometimes be hard to understand how they are calculated. CCP is not known to be consistent in the way they describe bonuses or how they are calculated.

Resistances

Resistances are often presented as a negative bonus value, ranging from -0 down to -100%. The value represent how much of the effect is removed, so a -70% resistance bonus reduces the effectiveness of electronic warfare by 70%. This attribute can sometimes be presented as a positive bonus value (for example in the traits tab of a tactical destroyer). The bonus works the same though, despite it being a positive number, in that the +66.6% resistance bonus reduced electronic warfare (in this case, weapon disruption and sensor dampening) by 66.6%.

ECM resistance works different from other electronic warfare resistances. For example, a Triage II module will give you an ECM Resistance of 100%, which means they cannot be jammed (even gives you a message that they cannot, which is useful to verify that they are indeed in Triage for example). A bonus of 50% on the other hand would first roll the 50% chance of simply failing (resisting) and if it does, then the attempt to jam will simply fail. If that roll fails to block the jam, it would then fall back to roll whether the ECM strength of the hostile jammer is enough to overcome the ECCM strength of the victim. It's basically a fizzle-chance, for lack of a better word, that's done before anything else.

Impedances

Impedances are also presented as either a positive (often in the case for ship's innate impedance values) or a negative bonus (commonly done for impedance bonuses from modules). If the value is a negative value, like a -60% impedance bonus, it means that any incoming remote assistance of that kind is reduced by 60%. If the value is a positive +80% impedance bonus it means that they will only receive 80% of the positive effect of the remote assistance.