"Southing" is a word in ENGLISH

The time at which the moon, or other heavenly body,
passes the meridian of a place.

Distance southward from any point departure or of
reckoning, measured on a meridian; -- opposed to northing.

Tendency or progress southward; as, the southing of the
sun.

Distance of any heavenly body south of the equator; south
declination; south latitude.

of South