Typical page layout in aircraft pilot’s logbook. It is essential to traditional navigation, and must be filled free nautical books pdf at least daily.
The readings of the log have been recorded in equal times to give the distance traveled with respect to a given start position. In military terms, a logbook is a series of official and legally binding documents. Logbook entries are sometimes of great importance in legal cases involving maritime commercial disputes. Commercial ships and Naval vessels often keep a “rough log”, – or “scrap log” – a preliminary draft of the ship’s course, speed, location, and other data, which is then transcribed as the “smooth log”, – or “official log” – the final version of the ship’s record.
Changes may be made to the rough log but the smooth log is considered permanent and no erasures are permitted. Alterations or corrections in an official logbook must be initialled by the authorised keeper of the logbook and the original data entries which have been cancelled or corrected must remain legible. It is then submitted to the fishing authorities of the vessel’s flag state. There are several programs to help radio operators in the management of their logbook.