1.1.4.1.2
The damage amount is the percentage chance that a hit will cause the crew of your target to be subverted. 20 damage = 20% chance. Values above 100%, typically seen when using mounts, are rounded down to 100%.
If the shot misses, there is zero chance of subVersion.
Addition: Shields and Armour provide no defense
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I learned this the hard way.
