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A logbook (a ship's logs or simply log) is a record of important events in the management, operation, and navigation of a ship. It is essential to traditional navigation, and must be filled in at least daily. The term originally referred to a book for recording readings from the chip log that was used to estimate a ship's speed through the ...
Diagram of a chip log attached to a log-line and reel on a ship. A chip log, also called common log, [1] ship log, or just log, is a navigation tool mariners use to estimate the speed of a vessel through water. The word knot, to mean nautical mile per hour, derives from this measurement method.
Impeller log:A variation of this approach is known as a patent log, which is towed from the stern of a ship. The patent log includes a mechanical register that counts the log's rotations as it is being towed. The patent log was invented in 1688 by the English instrument maker Humphry Cole. The patent log is also known as a screw log or taffrail ...
USS Jason (AR-8) was the fourth of the Vulcan class repair ship of the United States Navy in service from 1944 to 1995, serving in World War II, Korea, Vietnam, and the Gulf War. At the time of her decommissioning , Jason was (with the exception of USS Constitution ) the oldest ship in continual commission in the United States Navy, and the ...
USS Charleston (AKA-113/LKA-113) was an amphibious cargo ship, and was the lead ship of her class in the United States Navy. She was the fifth ship to be named Charleston for Charleston, South Carolina. She served as a commissioned ship for 23 years and 4 months.
USS Antietam (CV/CVA/CVS-36) was one of 24 Essex-class aircraft carriers built during and shortly after World War II for the United States Navy. The ship was the second US Navy ship to bear the name, and was named for the American Civil War Battle of Antietam (Maryland). Antietam was commissioned in January 1945, too late to serve actively in ...
USS Warrington (DD-843) was a Gearing-class destroyer that served the U.S. Navy from the end of World War II to the Vietnam War, when she was damaged by two underwater explosions, causing her to be listed as "beyond repair" and excessed to the Navy of the Republic of China.
USS Mount Vernon (LSD-39) was an Anchorage-class dock landing ship of the United States Navy.She was the fifth ship of the U.S. Navy to bear the name. [1] She was built in Massachusetts in 1972 and homeported in Southern California for 31 years until being decommissioned on 25 July 2003.