
They are also maintained to serve as potential evidence in legal proceedings in naval, admiralty, or civil courts. They serve as a reminder to the officers of the deck of their various duties, and to serve as a check on the activities of the officers of the deck. Note, however, that there are logs for only a few of the 1,465 LCTs constructed during the war.)ĭeck logs were created to form a chronological account of notable events occurring in and around a ship. (The World War 2 era is a partial exception to that rule. While "in service" vessels may produce logs that are submitted to their parent command, those logs are not retained as permanent records. Instead, they report through a higher-echelon parent command. Most service vessels (such as harbor tugs, landing craft, or launches) are classified as "in service" instead of "in commission" and do not possess their own administrative identity. A commissioned ship is a Navy command in her own right, having a distinctive administrative identity and creating records in her own name.

In Navy parlance, any kind of running record is called a "log." Many such logs are kept on board Navy ships, but only deck logs of commissioned Navy ships are retained permanently. View the list of logbooks that are online in the National Archives Catalog:
