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Piranha

Fast and agile scout submarine with sleek design and limited arsenal. Despite its very small size it can transport larger cargo by utilising its ballast as a storage room. Has a full fabrication setup as well as artifact transportation and deconstruction prepared rooms. Armed with 2 coilguns, 2 discharge coils and a depth charge.

• Dimensions: 28x9m
  
• Recommended crew size: 3 - 5
  
• Recommended experience: Intermediate
  
• Velocity: 25
  
• Descent velocity: 18
  
• Game version: v0.15.21.0

• full fabrication setup
  
• 2 coilguns, 2 discharge coils and a depth charge
  
• limited supplies (mostly autofill)
  
• bottom airlock that can be flooded for artifact transportation
  
• bottom airlock that can be disabled to flood the whole way to the deconstructor
  
• extremely small power grid (4 junction boxes)
  
• nuclear reactor controller
  
• backup battery array that can be controlled manually or automatically by logical circuit
  
• smart system that automatically closes doors when water is detected
  
• ballast designed for cargo transport
  
• ballast that can be disabled and drained to deal with unwanted alien flora

• "Automatic" enables automatic battery control. It will automatically adjust recharge rates and enable batteries when the main reactor fails to supply submarine with power.
  
• "Power In" enables batteries recharging from the power grid. (Does nothing with automatic control enabled)
  
• "Power Out" enables batteries discharging into the power grid. (Does nothing with automatic control enabled)

1. The "Flood Airlock" button can enable special mode where the airlock is always filled to 50% with water - very helpful when dealing with alien artifacts
   
2. If you want to dump some items out of the airlock, just place them under the platform and use "Toggle Outside Hatch" button to flush them out.
   
3. If you want to dump some bodies (human or alien), then simply opening outside hatch won't work because the water rushing in will push them above the platform. But you can use the special "Flush Airlock" button that will first fill the airlock with water and then open the outside hatch so the bodies can sink without being pushed up.