The color of the sea shifts from light to dark blue, almost purple. We are now in the Gulf Stream somewhere between Key West and Havana. The wind blows from the north and the current flows against it. Where the two meet, the waves grow upward and we roll like a 40 foot bobber with a sail on it. Only 90 miles of ocean separate the United States from Cuba, but don’t let anyone fool you into thinking there isn’t plenty of beautiful and dangerous water out there.