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Hull: Longship
Weapons: Ripper II x2
Armor: Depleted Uranium I x2
Special: Engine Upgrade I

This design is faster than Gunboats & far more deadly. You can use whatever armor & weapons you choose/have available, the most important part is the Engine Upgrade.

For example my older designs:
      Titanium I x2, Ripper I & Hydra I.
      Steel I x2, Ripper II & Hydra I