How to launch an ICBM?

Prerequisites:

• At least the ICBMs technology has been researched
• A fully constructed rocket in either a rocket-silo or a ballistic rocket-silo
• At least one payload-vehicle (or valid warhead if using the Use legacy launch system setting), loaded into the above rocket-silo rocket
• Something that offends you, i.e. biters or pentapods (something to target, in seriousness)

Manual:

If the above prerequisites are ready, either manually select the target destination with the ICBM-remote (available as a shortcut after researching the ICBMs technology, or from pressing ALT + SHIFT + T (default hotkey, configurable)).

Circuit:

If the above prerequisites are ready, connect the circuit-network direcly to the rocket-silo (ballistic or otherwise). Once connected, a new GUI window should appear to the right of the default rocket-silo GUI; this new window should list the following signals:

• Launch: Defines which signal indicates a launch should be attempted (default of 'green-check' signal)
• X: Defines which signal indicates the X coordinate of the target (default of 'X' signal)
• Y: Defines which signal indicates the Y coordinate of the target (default of 'Y' signal)
• I: (For multi-surface strikes) Defines which signal indicates the surface index - determines the surface to target (default of of 'I' signal)
  • The needed I value for a given surface can be determined from the value listed next the the surface/planet's name available from the dropdown list in the GUI window

Caveats:

• Regular rocket-silos cannot target different surfaces than the one they are on (outside of "orbit" surfaces) by default. Can be toggled via a runtime setting.

• Multi-surface launches/targeting will not work if the target surface has not been discovered/generated yet.