South wind

south wind, southerly wind - Wind coming from the south.
south - One of the 4 cardinal compass points. South is the direction toward the South Pole and is at 180° on a compass card.
spar buoy - A tall buoy used as a navigational aid.

A fall, with a south wind, precedes rain.
A sudden and considerable fall, with the wind due west, presages a violent storm from the north or northwest, during which the glass will rise to its former height.

The leaves on the trees rimming Chesapeake Bay were starting to turn, but the south wind, steady at 10 knots, carried the hope of Indian summer on a balmy autumn day. Of course, it was easy to be optimistic, not to mention lazy. The sailing was ideal.

Auster:
Old Latin name for the south wind.
Autopilot:
Electro:mechanical steering device; an instrument designed to control automatically a vessel's steering gear so that she follows a pre:determined track through the water.

See also: After, Schooner, Screw, Sheet, Shore