Sonic Defences

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General Information


The sonic defence module is a defense measure that launches sonic attacks against an incoming retaliation ship (an alien Dreadnought).

It is the end result of sonic based research.

While the increase in power over the Gauss Defences is proportional to the increase in initial cost, maintenance is only marginally more expensive.

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


Construction Time: 34 days
Construction Cost: $600,000
Maintenance: $12,000/month

Defense Value: 900
Hit Ratio: 70%

See Also

TFTD Badge Terror From The Deep
Base Facilities:Air-LockLiving QuartersLaboratoryWorkshopGeneral StoresAlien Containment
Sub PenStandard SonarWide Array SonarTorpedo DefencesM.C.-LabTransmission Resolver
Gauss DefencesSonic DefencesP.W.T. DefencesM.C. GeneratorBombardment Shield