The Cassini projection is a transverse cylindrical projection and is neither equal-area or conformal. It is best used for areas that are mostly in the north-south direction.
Linear graticules are located at the Equator, central meridian, as well as meridians 90° from the central meridian.
With increasing distance from central meridian, scale distortion increases. Scale is true along the central meridian and lines perpendicular to the central meridian.
Cassini is used for large maps of areas near the central meridian. The extent is 5 degrees to either side of the central meridian.
Source: Snyder and Voxland, 1989