You can buy one day, 3 day also on that site. I think your good if you buy it on your phone. But I think they require you to carry a paper copy. Guess your going to have to install another piece of electronics on your boat. A printer. Lol. Wow. I haven't been out to the islands since the fall. I am from Buffalo, NY area and love fishing over by you. Sent from my iPhone using Lake Erie United