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Taffrail Log Rotator Mechanical speed logs called patent logs [1] or taffrail logs, operating on physical principles in a manner similar to a car's odometer by towing a vane or rotor from the stern (or taffrail) by a long line, were developed in the eighteenth century (or earlier) but became practical in the nineteenth century and replaced the ...
A taffrail should not be confused with a pushpit, which is a common name for the tubular protection rail running around the stern of a small yacht. [6] A taffrail log is a mechanical speed logging device, used like a car odometer. The taffrail log was towed from the stern or taffrail of the ship by a long line.
Known for. Marine chronometer. Thomas S. Negus (May 1, 1828 – March 17, 1894) was a 19th-century American businessman. He was well known for the manufacture and sale of maritime chronometers and nautical instruments in New York City under the name T.S. & J.D. Negus Company. He served on the Board of Pilot Commissioners for New Jersey.
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 ...
Thomas Walker & Son were inventors and makers of nautical instruments in the 19th and 20th centuries. The firm made one of the most commonly used navigation instruments, the 'log' which allowed sailors to measure distance at sea, [1][2] one of the main measurements used in nautical navigation. The firm was founded by Thomas Walker in Birmingham ...
H. Taprell Dorling. Captain Henry Taprell Dorling (1883–1968) was a British sailor, author, and journalist who served in the Royal Navy during both World War One and World War Two, giving his marine fact and fiction a notable authenticity. His Pincher Martin, O.D. (1916) is widely referenced as the source for Pincher Martin (1956) by Nobel ...
The stern is the back or aft -most part of a ship or boat, technically defined as the area built up over the sternpost, extending upwards from the counter rail to the taffrail. The stern lies opposite the bow, the foremost part of a ship. Originally, the term only referred to the aft port section of the ship, but eventually came to refer to the ...
In naval architecture, an afterdeck or after deck, or sometimes the aftdeck, aft deck or a-deck is the open deck area toward the stern or aft back part of a ship or boat. The afterdeck can be used for a number of different purposes, yet not all ships have an afterdeck. In place of the afterdeck, a ship may be built with a poop deck, that is a ...