What Is a Logbook?
The written record of a yacht’s passages and condition — part seafaring tradition, part fault-finding tool, and often the most valuable document on sale day.

A logbook is the book where a yacht’s passages and condition are recorded. It is not compulsory on a private boat, but it is an extremely valuable habit because it serves three purposes: diagnosis, value and legal record.
The answer to ‘when did this vibration start’ is there in the book for the person who keeps it; the fault history is half the engineer’s job. A yacht with proper maintenance and passage records is, at sale time, a boat with a documented story. A record written promptly after an incident is stronger than a statement written months later.
Five-line template
Per passage: date, route (from–to), engine hours, weather/sea state, note (event–maintenance–observation).
Monthly condition page: battery voltages, bilge inspection, tank status.
Back-up: taking a photo of the paper logbook on your phone from time to time is a free copy against fire or water damage.
So the first season’s enthusiasm does not fade into empty pages in the second, the best approach is to keep it simple: a five-line template per passage is better than a novel. The maintenance pages are where the real value lies; every oil change, impeller and anode replacement should be entered with date and hours. For Care members, the digital version of this logbook is already kept; every visit is a photo-evidenced logbook entry.