Signature radius

The signature radius of your ship represents how large the electronic footprint of your ship is. While the signature radius does not describe how big the ship appears visually, most other aspects are governed by the signature size of the ship.

General Information

The signature radius is, all intents and purposes how "big" on somebody else sensors. While ship size and signature radius general correspond (a frigate is smaller and has a smaller signature radius then a battleship), this is not necessarily true for all situations. In particular Tech II ships can have a very different signature size, even if they use the same hull size as their Tech I counterpart.

Example: Tech I, Osprey, size: 348m, signature radius: 125 Tech II, Basilisk, size: 348m, signature radius 90

Important effects of the signature radius are:

• How fast your ship can be targeted
• How much damage is taken from missiles, turrets and bombs (in oppose to smartbombs, which are not affected).
• How easy your ship can be detected with combat probes.

Targeting Time

One of the central effects of the signature radius is the profound effect it has on the time it takes to target a ship. This is easy to remember once you consider the signature radius is the size your ship has on the sensors.

Targeting Time Equation

Here is the equation for missile damage:

Here are the terms in the equation:

X	Effective scan resolution of your ship	Note: The bigger the faster
Y	Signature radius of the target	Note: The bigger the faster

Modifying the Base Scan resolution

The scan resolution of the targeting ship is affected by various aspects.

The ship itself has a base scan resolution (which can be modified only on Tech 3 Cruisers through different submodules).

The base scan resolution can be altered by skills, modules and rigs.

Modules and Rigs

• Cloaking devices

Fitting a cloaking device in high slot of your ship will reduce the signature resolution even when the module is offline significantly (Prototype Cloak, -50% scan resolution) The covert ops cloak, that can only be fitted on specific ships does not have this penalty.

• Sensor Booster

This medium modules increases the scan resolution as well as the targeting range (Sensor Booster I, 25%). The module can be loaded with a script that disables one of the affect to benefit the other. If it is loaded with a scan resolution script the effect is 50% increase in scan resolution, but the targeting range does not increase anymore.

• Warp Core Stabilizer

This low slot module decreases the scan resolution (as well as targeting range) significantly (Warp Core Stabilizer I, -50% scan resolution)

• Signal Amplifier

This low slot module increases your scan resolution by (as well as targeting range) a little (Signal Amplifier I, 10 % scan resolution)

• Targeting System Subcontroller I

This rig increases the scan resolution by 20%.

Skills and Implants

• Signature Analysis

This skill will increase the scan resolution by 5% per level.

• Leadership

This skill will increase the targeting speed directly by 2% per level. The skill requires a fleet to work. You can find more information in the article about Fleet Leadership

• Slot 7: Hardwiring - Zainou 'Gypsy' KNB-25 (also available as KNB-50 and KNB-75)

This implant for slot 7 increases your scan resolution by 1% (respectively KNB-50, 3%, KNB-75, 5%)

Signature radius effect on Weapon Damage

A smaller signature radius can help to reduce incoming damage from turrets, missiles and bombs.

You can find more information about this effect and the equations in the dedicated articles about Turret Damage, Missile Damage and Bombs

The only weapon system that is not affected by signature size is the smartbomb.

Modifying the the Base Signature radius

Modules and Rigs

There are no skills that alter the signature radius of your ship. However, there are several modules that will increase either your or your opponent's signature radius:

• Microwarpdrives: These propulsion modules increase your signature radius by 500% while active (less for faction modules) in exchange for a 500% increase in speed. Note that while you have this active, all turret-based ships have a much greater chance to hit you. This can be offset by your increased speed, as long as you do not fly directly at the target. Against missiles, the increase in signature radius has no real effect on incoming damage, as the increase in velocity counters it.
• Target Painters: These EWAR modules increase the target's signature radius by 25-30%. This increase in signature radius can greatly boost damage if the target is smaller than the missile/turret type used against it, or if it's moving too quickly for the explosion radius of the missile/tracking of the turret. If your turrets hit often or the missile's explosion velocity is much larger than the target's velocity, target painters will have very little effect.
• Shield Extenders: The small, medium, large, and x-large shield extenders add a flat 1, 2, 7, and 25 m to the ship's signature radius, respectively.
• Shield Rigs: Each increases the ship's signature radius by 10%. Note this penalty can be reduced to 5% with the shield rigging skill.
• Inertial Stabilizers: These increase your signature radius by 10-11%.

Skills and Implants

Halo implants, Skirmish Warfare Link - Evasive Maneuvers, and X-Instinct Boosters can all reduce the signature radius of your ship.

Signature Radii of Ships, by Hull Type

Data as of Inferno 1.2

Ship Name	Ship Type	Signature Radius (m)
Amarr Shuttle	Shuttle	25
Apotheosis	Shuttle	25
Caldari Shuttle	Shuttle	25
Gallente Shuttle	Shuttle	25
Minmatar Shuttle	Shuttle	25
Zephyr	Prototype Exploration Ship	25
Gold Magnate	Frigate	30
Slasher	Frigate	30
Claw	Interceptor	30
Silver Magnate	Frigate	30
Stiletto	Interceptor	31
Executioner	Frigate	31
Crusader	Interceptor	32
Dramiel	Frigate	32
Condor	Frigate	33
Echelon	Frigate	33
Wolf	Assault Ship	33
Malediction	Interceptor	33
Freki	Assault Ship	33
Jaguar	Assault Ship	34
Raptor	Interceptor	34
Hound	Stealth Bomber	34
Republic Fleet Firetail	Frigate	35
Rifter	Frigate	35
Cruor	Frigate	35
Daredevil	Frigate	35
Succubus	Frigate	35
Tormentor	Frigate	35
Retribution	Assault Ship	35
Atron	Frigate	35
Ares	Interceptor	35
Crow	Interceptor	36
Taranis	Interceptor	36
Cambion	Assault Ship	37
Purifier	Stealth Bomber	37
Nemesis	Stealth Bomber	37
Harpy	Assault Ship	37
Vengeance	Assault Ship	37
Enyo	Assault Ship	37
Punisher	Frigate	37
Imperial Navy Slicer	Frigate	38
Utu	Assault Ship	39
Hawk	Assault Ship	39
Ishkur	Assault Ship	39
Manticore	Stealth Bomber	39
Merlin	Frigate	39
Malice	Assault Ship	40
Caldari Navy Hookbill	Frigate	40
Worm	Frigate	40
Breacher	Frigate	41
Probe	Frigate	41
Tristan	Frigate	42
Incursus	Frigate	42
Federation Navy Comet	Frigate	42
Burst	Frigate	43
Inquisitor	Frigate	43
Magnate	Frigate	43
Vigil	Frigate	44
Bantam	Frigate	44
Imicus	Frigate	45
Navitas	Frigate	46
Cheetah	Covert Ops	46
Crucifier	Frigate	46
Kestrel	Frigate	47
Anathema	Covert Ops	47
Reaper	Rookie ship	48
Heron	Frigate	48
Maulus	Frigate	48
Helios	Covert Ops	49
Buzzard	Covert Ops	50
Impairor	Rookie ship	50
Griffin	Frigate	50
Hyena	Electronic Attack Ship	51
Ibis	Rookie ship	52
Sentinel	Electronic Attack Ship	53
Velator	Rookie ship	54
Keres	Electronic Attack Ship	55
Thrasher	Destroyer	56
Kitsune	Electronic Attack Ship	58
Coercer	Destroyer	62
Aliastra Catalyst	Destroyer	65
Intaki Syndicate Catalyst	Destroyer	65
Catalyst	Destroyer	65
InterBus Catalyst	Destroyer	65
Scimitar	Logistics	65
Inner Zone Shipping Catalyst	Destroyer	65
Quafe Catalyst	Destroyer	65
Cormorant	Destroyer	68
Oneiros	Logistics	70
Guardian	Logistics	70
Sabre	Interdictor	75
Etana	Logistics	75
Heretic	Interdictor	83
Eris	Interdictor	86
Flycatcher	Interdictor	90
Basilisk	Logistics	90
Scythe Fleet Issue	Cruiser	90
Stabber Fleet Issue	Cruiser	94
Scythe	Cruiser	100
Stabber	Cruiser	105
Exequror Navy Issue	Cruiser	108
Bellicose	Cruiser	110
Prowler	Transport Ship	110
Cynabal	Cruiser	110
Augoror	Cruiser	110
Omen Navy Issue	Cruiser	112
Osprey Navy Issue	Cruiser	112
Vagabond	Heavy Assault Ship	115
Viator	Transport Ship	115
Prorator	Transport Ship	115
Exequror	Cruiser	120
Adrestia	Heavy Assault Ship	120
Osprey	Cruiser	125
Zealot	Heavy Assault Ship	125
Crane	Transport Ship	125
Omen	Cruiser	125
Huginn	Combat Recon Ship	127
Caracal Navy Issue	Cruiser	130
Mimir	Heavy Assault Ship	130
Muninn	Heavy Assault Ship	130
Maller	Cruiser	130
Broadsword	Heavy Interdictor	130
Arbitrator	Cruiser	130
Ashimmu	Cruiser	130
Vigilant	Cruiser	130
Phantasm	Cruiser	130
Rupture	Cruiser	130
Rapier	Force Recon Ship	132
Augoror Navy Issue	Cruiser	132
Vangel	Heavy Assault Ship	135
Cerberus	Heavy Assault Ship	135
Moa	Cruiser	135
Onyx	Heavy Interdictor	135
Vexor Navy Issue	Cruiser	135
Celestis	Cruiser	135
Thorax	Cruiser	140
Devoter	Heavy Interdictor	140
Sacrilege	Heavy Assault Ship	140
Guardian-Vexor	Cruiser	140
Ishtar	Heavy Assault Ship	145
Caracal	Cruiser	145
Curse	Combat Recon Ship	150
Covetor	Mining Barge	150
Hulk	Exhumer	150
Proteus	Strategic Cruiser	150
Tengu	Strategic Cruiser	150
Loki	Strategic Cruiser	150
Legion	Strategic Cruiser	150
Mastodon	Transport Ship	150
Gila	Cruiser	150
Blackbird	Cruiser	150
Vexor	Cruiser	150
Primae	Industrial	150
Eagle	Heavy Assault Ship	150
Lachesis	Combat Recon Ship	155
Pilgrim	Force Recon Ship	156
Phobos	Heavy Interdictor	160
Wreathe	Industrial	160
Deimos	Heavy Assault Ship	160
Impel	Transport Ship	160
Arazu	Force Recon Ship	162
Occator	Transport Ship	165
Bustard	Transport Ship	165
Tornado	Battlecruiser	170
Rook	Combat Recon Ship	173
Oracle	Battlecruiser	180
Falcon	Force Recon Ship	180
Hoarder	Industrial	180
Naga	Battlecruiser	190
Iteron	Industrial	190
Procurer	Mining Barge	200
Iteron Mark III	Industrial	200
Mammoth	Industrial	200
Skiff	Exhumer	200
Talos	Battlecruiser	200
Sigil	Industrial	210
Iteron Mark II	Industrial	210
Bestower	Industrial	210
Iteron Mark IV	Industrial	220
Iteron Mark IV Amastris Edition	Industrial	220
Badger	Industrial	220
Iteron Mark IV Quafe Ultramarine Edition	Industrial	220
Iteron Mark IV Quafe Ultra Edition	Industrial	220
Iteron Mark V	Industrial	230
Sleipnir	Command Ship	240
Hurricane	Battlecruiser	240
Cyclone	Battlecruiser	240
Claymore	Command Ship	240
Noctis	Industrial	250
Mackinaw	Exhumer	250
Badger Mark II	Industrial	250
Retriever	Mining Barge	250
Prophecy	Battlecruiser	265
Harbinger	Battlecruiser	265
Damnation	Command Ship	265
Absolution	Command Ship	265
Vulture	Command Ship	285
Drake	Battlecruiser	285
Nighthawk	Command Ship	285
Ferox	Battlecruiser	285
Panther	Black Ops	288
Eos	Command Ship	300
Myrmidon	Battlecruiser	300
Brutix	Battlecruiser	300
Astarte	Command Ship	300
Typhoon	Battleship	320
Typhoon Fleet Issue	Battleship	320
Redeemer	Black Ops	333
Machariel	Battleship	340
Tempest Fleet Issue	Battleship	340
Tempest	Battleship	340
Armageddon	Battleship	370
Armageddon Navy Issue	Battleship	370
Sin	Black Ops	378
Nightmare	Battleship	400
Apocalypse	Battleship	400
Megathron	Battleship	400
Apocalypse Imperial Issue	Battleship	400
Bhaalgorn	Battleship	400
Megathron Navy Issue	Battleship	400
Apocalypse Navy Issue	Battleship	400
Armageddon Imperial Issue	Battleship	400
Vindicator	Battleship	400
Dominix	Battleship	420
Dominix Navy Issue	Battleship	420
Vargur	Marauder	425
Scorpion Navy Issue	Battleship	430
Widow	Black Ops	432
Raven Navy Issue	Battleship	460
Raven	Battleship	460
Rattlesnake	Battleship	460
Maelstrom	Battleship	460
Abaddon	Battleship	470
Scorpion	Battleship	480
Hyperion	Battleship	485
Rokh	Battleship	500
Kronos	Marauder	500
Paladin	Marauder	500
Orca	Industrial Command Ship	550
Golem	Marauder	575
Nomad	Jump Freighter	2708
Ark	Jump Freighter	2812
Naglfar	Dreadnought	2860
Nidhoggur	Carrier	2865
Anshar	Jump Freighter	2884
Archon	Carrier	2920
Rhea	Jump Freighter	2928
Thanatos	Carrier	2960
Revelation	Dreadnought	2975
Moros	Dreadnought	3045
Chimera	Carrier	3065
Phoenix	Dreadnought	3100
Fenrir	Freighter	3385
Providence	Freighter	3515
Obelisk	Freighter	3605
Charon	Freighter	3660
Rorqual	Capital Industrial Ship	4500
Hel	Supercarrier	11640
Aeon	Supercarrier	11870
Revenant	Supercarrier	11870
Nyx	Supercarrier	12010
Wyvern	Supercarrier	12470
Ragnarok	Titan	15430
Avatar	Titan	15760
Erebus	Titan	16205
Leviathan	Titan	16590