The law was changed as of January 1 to require proctored exams. You'll find more info at:
http://www.boat-ed.com/nh/index.htm
New Hampshire Boating Safety Course and Exam
Welcome to the official boating safety course developed for the New Hampshire Department of Safety. By passing the online exam, you will be well-prepared to pass the proctored final exam that is required to fulfill your obligation under the law.