I think the whole point of noting the tradewinds, and them changing with the seasons, is to give an explanation as to how/why the raft ends up back at the island. They shove off quickly to set sail with the favorable winds and head out to see being carried by wind and currents. Unfortunately they left too late and a short while into their trip the winds change, current patterns shift, and wouldn’t you know it… we are back to the island. Sure they will land somewhere else, maybe they find the rest of the plane, the black rock, or the ‘others’, but they will return (at least the ones who survive the experience).
This is the obvious conclusion based on the science teacher’s deduction that the winds will shift directly from North to South.
TenPin ![](http://community.realitytvworld.com/boards/User_files/41efef3a233b790c.jpg)
I am a science teacher, and unless this guy has lived/researched out on a pacific island, or oceanography is his passion, his portrayal is pretty corny.