Signature radius

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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 most weapons.
  • How easily your ship can be detected with combat probes.

Targeting Time

One of the effects of signature radius is how long 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

Targetingtime.png

Here are the terms in the equation:

Effective scan resolution of your ship Note: The bigger the faster
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 has a base scan resolution, which 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 scan resolution even when the module is offline (Prototype Cloak, -50% scan resolution). The covert ops cloak, which can only be fit on specific ships (specifically, Blockade Runners, Covert Ops frigates, Stealth Bombers, Force Recon cruisers, and T3 cruisers with the Covert Reconfiguration subsystem), does not have this penalty.

  • Sensor Booster

This medium module, often called a "SeBo", increases the scan resolution and the targeting range of the fitted ship (Sensor Booster I, 25%). The module can be loaded with a script that disables one of the effects to double the other.

  • Sensor Damper

This mid-slot targeted module, often simply called a "damp", will significantly reduce the scan resolution (and targeting range) of the ship it is applied to. Like the Sensor Booster, it can be loaded with a script that doubles the potency of one of the effects while disabling the other.

  • 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 (as well as targeting range) by a little (Signal Amplifier I, 10 % scan resolution)

  • Targeting System Subcontroller I

This rig increases scan resolution by 20%.

Skills and Implants

  • Signature Analysis

This skill will increase 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. This means 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

Sortable table of all ships avalible to the player in EVE and their signature size (as of 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