This 66 page logbook refill pack with dividers includes 42 log pages, 20 dive site graphs (so you can map out where you found the sunken treasure for next time) and 4 system checklists. Space is provided so you can update your personal, emergency and medical information. There is also a page for a record of your training and additional pages for your personal dive buddy directory. Standard size also fits a variety of agencies 3 ring style log books.