Quick answer
Place and upgrade gun towers only after checking their current unlock, coverage, construction and operating requirements. Test the defended approach and keep fleet support available.
What the reviewed sources establish
- Fleet combat and settlement defense are part of the official game framing.
- Buildings and ships depend on production and logistics.
- Exact balance can change in patches.
Use this current-build checklist
- Identify the threatened approach.
- Open the current tower panel.
- Check construction and operating requirements.
- Place for visible coverage without blocking logistics.
- Test one attack path and adjust deliberately.
Keep the answer current
- Do not copy an old upgrade cost or range.
- More towers cannot repair a missing supply chain.