Space

Space is the uppermost domain in From the Depths.

Gravity

Gravity starts decreasing linearly at 700m altitude an reaches zero at 1300m. For balance-reasons, gravity re-enables above 1800m altitude, reaching sea-level strength at 2500m, and further increasing with altitude.

Air

Air density starts decreasing exponentially at 275m, and reaches zero at 1200m.

Despite the lack of atmosphere, there is still drag in space.

Components

Ion Thruster

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Reason: "Stats were almost certainly changed since, though they still work in space, air, and under water."

The Ion Thruster (under the Air category) is the only type of thruster to work in space. They can also work in the atmosphere and underwater, but are less efficient than other thrusters for doing so. Compared to (simple) Jet Engines, Ion Thrusters have 60% of the power efficiency and 30% of the thrust density, which correspond to a a break-even altitude of 380 m and 440 m respectively. They produce no heat in comparison to jets meaning that they are an option for stealth planes.

• Huge Ion Thruster: Produces 1350 thrust for 90 power.