The Waterproof Diver's Log Book with Equipment List, Map Pages offers plenty of space to record all the details of 165 dives, including water conditions, visibility, tank pressure, notes and the names of the divemaster, instructor and dive buddy. Also includes equipment checklist page, personal information/emergency contact page, and 9 pages for sketching dive maps. Dive log books aren't just for instructors, students or technical divers. It s important for every diver to log every dive.