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Chapter 2: Starship Combat / Starships in Atmosphere / Additional Hazards

Damaging Atmospheres

Source Starship Operations Manual pg. 52
Particularly alien atmospheres sometimes have properties that cause them to eat away at a starship’s hull, bypassing any shields that the starship might have. Examples include corrosive atmospheres, atmospheres with extreme heat or pressure, or even atmospheres that precipitate jagged shards of silicon at velocities sufficient to slice through a starship’s hull.
Each time a starship moves through a hex containing a damaging atmosphere, it takes Hull Point damage equal to its tier. This is in addition to any damage the starship takes due to friction.