Log book is also called "log book". Carrier's document that records the main situation of the ship during navigation and berthing. Registered by the driver on duty on time. The recorded items include course, speed, dead position, meteorology, tidal current, sea surface and channel conditions, fuel consumption, passengers getting on and off, cargo loading and unloading, major events occurring during ship navigation and berthing, etc. The logbook is the record of the daily work of the ship, the basis for checking the crew's duty, and the original data that must be cited and can play a legal role when dealing with maritime affairs. ?

So fill it in with a black pen or signature pen to prevent tampering without a pencil, and modify it with a red pen or signature pen.