User blog comment:Kaido King of the Beasts/Chapter 818: Stepping Stones to One Piece/@comment-3177945-20160303224020

Awesome, just have one problem. I thought charts couldnt be used on the grand line, since there is no way to know the direction your heading. If all 4 points were islands I guess you could go from one of them to the one opposite to it, and wait for log poses from the remaining two to align with each other (the new log is actually 3 so..). But if that were the case, then raftel wouldnt be the last island no more would it? Can someone make sense of how to actually get there?