Before attempting to fly the Hudson, you need to take on-line training from the following site:  https://faasafety.gov/gslac/ALC/course_content.aspx?cID=79. For good measure you should first fly it with an instructor who has done it many times before. Private Pilot, Glenn Pagano, did such a great job navigating and communicating his way down the Hudson, CFI, Tom Fischer, had a chance to snap a few pics.