At EMF Camp last summer, Dan W gave a great talk about his similar Unknown Fields trip on a container ship. This by far was one of the highlights of the event, as it was extremely insightful into this hidden world. You can watch the talk at http://www.iamdanw.com/said/emfcamp/

Dan is now writing up the journey, you can follow his tales at http://www.iamdanw.com/postcards/