Sonic Defences
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.
Statistics
Construction Time: 34 days
Construction Cost: $600,000
Maintenance: $12,000/month
Defense Value: 900
Hit Ratio: 70%