Note the basic wave & wind patterns and those are an indicater.
You know, one of the things he mentioned looking for was the "ripple" action in the water from islands. Now this guy was still a couple hundred miles from Guadeloupe, but knew that he'd be able to see this wave pattern amongst the "standard" wave trains of the open ocean.
That really astounded me - not being an ocean sailor. It makes perfect sense - but actually being able to eventually see that kind of subtlety in the things around me will be extremely cool.
That is, until a freakin' whale lands on my boat.