Meridians: Central meridian is straight. Other meridians are complex curves.
Parallels: Complex curves.
Symmetry: About the central meridian.
This equal-area projection groups the continents about the center of the projection. The only point free of distortion is the center point. Distortion of shape and area are moderate throughout.
This projection was presented by William Briesemeister in 1953. It is an oblique Hammer projection with an axis ratio of 1.75 to 1, instead of 2 to 1.