This question is a bit tricky because it plays on words. Here's why:

* Latitude refers to the angular distance, measured in degrees, north or south of the equator.

* South refers to the hemisphere below the equator.

* Northernmost implies the point furthest north.

Putting these together, the "northernmost" point of the "South" would be the equator itself. The equator has a latitude of 0 degrees.