Under your profile, you will see a field for logbook code. You make it up and enter it here. The logbook code is to be given to instructors and schools so they can pull your profile into their access system. This way they can manage your instructor sign-offs and see what courses you have passed before you show up for practical training. They can also see your sailing resume which helps them determine how much sailing experience you have. You also give your logbook code to yacht charter companies as well as your NauticEd login email ID. This allows yacht charter companies to view in real-time your sailing resume and make a decision if you are charter-ready or not.