Spacecraft in the Shattered Worlds employ a composite armour made up of layers of ceramic, crystalline carbon and plastics. This is non-reactive armour; most navies feel that the problems inherent in using reactive armour on a spacecraft outweigh its benefits.

For each slot of armour placed on a ship, the ship gains Damage Reduction (DR) equal to half its Linear Value.

Round down only after doing the math, so that you get the most out of your fractions.