Small Radar System

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General Information

Small Radar
Base-small radar.gif

A small detection system has an effective range of 300 nautical miles and is linked to satellite systems for ground search. Each system has a 5% chance of detecting an average sized object every 10 minutes.

Source: Enemy Unknown Ufopaedia
(UFOpaedia text is erroneous)

Small Radar: Level 0
Small Radar: Level 1

Radar systems provide UFO Detection for bases. The Small Radar System is a basic radar that is cheap and quick to build.

Every thirty minutes of game time, each base with a Small Radar has a 10% chance of detecting a UFO within an approximate 1300-1500 mile radius (this may vary based on UFO size), and can track existing contacts up 2000 mile radius. If you advance the time an hour or day at a time, it will make multiple checks and interrupt if a UFO is detected, setting the time to be at whatever point the detection happened (even if it is only five seconds after the last update).

Whether these chances are affected by the size of the UFO is unknown, the UFOpedia suggest that it does play a part, but the description text is wrong about all the other details.

A small Radar System can be used to boost the short range detection of a Large Radar System to 30%. Any more radars of either type have no game effect, except on the detection meters on the Base Information page. Both types of Radar become redundant once a Hyper-wave Decoder has been installed at a base.

This base facility appears in UFO: Enemy Unknown. For the Terror from the Deep equivalent, refer to the Standard Sonar.


Please only use the following as a guide, you may find that just inside or outside the circle you can get/maintain detections. Remember once you have spotted a UFO you can normally only lose tracking of it on the stroke of a half hour, so fast UFOs might sometimes still be visible when outside this radius by a significant margin (i.e. they can get to Nigeria, India, and similar extents in some cases)

Note the base in the image is located slightly SE of Budapest (at the base between the E and S when zoomed in the maximum). The outer ring is based on the extents that a UFO can be tracked to, the detection radius seems to be only 67-75% or so of this range, but this may vary according to the UFO size (needs determining). Ranges may also vary according to the latitude that bases are built at (needs checking).

Approx small radar coverage (inner).PNG


Construction Time: 12 days
Construction Cost: $500,000
Maintenance Cost: $10,000/month
Detection Abilities
Short +10
Long 0
Hyperwave 0

The above detection abilities are one-time-bonuses per base. The base detection values are recalculated every time a new building is completed on a base.

See Also

UFO Detection

UFO Badge X-COM: Enemy Unknown/UFO Defense
Base Facilities:Access LiftLiving QuartersLaboratoryWorkshopGeneral StoresAlien Containment
HangarSmall RadarLarge RadarMissile DefencesPsionic LaboratoryHyper-Wave Decoder
Laser DefencesPlasma DefencesFusion Ball DefencesMind ShieldGrav Shield