The farther the standard parallel is from the Equator, the greater the length of the meridians. Poles are lines of length equal to the Equator. Shape is true along the standard parallels of the normal aspect. Shape distortion is severe near the poles of the normal aspect. There is no distortion of area.
Local angles are correct along standard parallels or standard lines.
Direction is distorted elsewhere. Scale is true along the Equator. Recommended for narrow areas extending along the central line. Severe distortion of shape and scale near the poles. Suitable for regions of north-south extent or those following an oblique central line, when using a transverse or oblique view, respectively.