A explanation of the trade winds system that affects the South Pacific South of the Equator these where used to assist interisland and intercontinent travel by ships for ions. Closer to the the southern line of the equator the tradewinds blow in from the south east. 

Also plays a part in weather formation by moving moisture into the south pacific from a east to west direction more south of the equator trade winds section. 

The trade winds became so called for there ability to create "trade routes" along there wind pathways useful for a variety of sailing vessels.  

The Trade-winds also became affectionately known as the "easterlies" blowing in east to west north and south of the equator.