Concerns about smoke dispersion impacted propulsion design. Size of the plant influenced both the placement of the boilers and the amount of smoke generated. A moderate 53,000shp power plant could be placed further aft than a 100,000shp plant without affecting trim. The further aft the boilers were placed the further aft the stacks could be too, dispersing smoke over less of the deck. The smaller plant also produced less gasses than a 100,000shp plant. Due to space limits, the carrier was equipped with geared turbines.