Upgrade (RRF material)

Upgrade was an  option, an Alpha Quadrant Alliance designation for the visual appearance of a spacecraft's outer hull, i.e. a vessel's "skin".The Romulan version of Upgrade was available for some warbird classes of the Romulan Republic and its Romulan Republican Force. Upgrade put the ship in a multifaceted green cover, with panels of different shades. The warp plasma in the nacelles appeared bright green. 

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Related ship classes are sorted together, rather than alphabetically.