Climate help needed!

[Qwynegold]

Interesting. What book is that from?

It's from a big-ass atlas called Geographica.

Countercurrents exist everywhere. (There's actually a quite important one running directly east of the Gulf Stream.) However, from a climatological standpoint they're insignificant. Even if you plan to deal with sea travel or fishing economies, it's easier to just assume that countercurrents are just there than to indicate them on your map. That countercurrents exist doesn't change the main mass of the water flow.

Stuff like the northern Indian Ocean and the arctic currents are why you need to map your largest masses of water first.

Oh, now I see. I didn't even know there was a difference between regular currents and counter-currents. So around the Equator, the important currents just go from east to west?