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{{Short description|Boat that maneuvers other vessels by pushing or towing them}}{{About|the boat}}{{Redirect|Tug|other uses|Tug (disambiguation)}}{{Redirect|Tugs|the television series|Tugs (TV series){{!}}Tugs (TV series)}}File:CSSTeaser.jpg|thumb|upright=1.35|Tugboat CSS Teaser is captured by USS Maratanza.]]File:Tug Boat NY 1.jpg|thumb|right|Justine McAllister, a tug boat in New York HarborNew York Harbor(File:MarcusHookTugs.gif|thumb|The tugboats Reid McAllister and McAllister Responder push the LPG tanker BW Volans into port at Marcus Hook on the Delaware River.)A tugboat or tug is a marine vessel that manoeuvres other vessels by pushing or pulling them, with direct contact or a tow line. These boats typically tug ships in circumstances where they cannot or should not move under their own power, such as in crowded harbors or narrow canals,“How Pygmy Tugboats Dock a Giant Liner.” Popular Science Monthly, March 1930, p. 22-23. or cannot move at all, such as barges, disabled ships, log rafts, or oil platforms. Some are ocean-going, and some are icebreakers or salvage tugs. Early models were powered by steam engines, which were later superseded by diesel engines. Many have deluge gun water jets, which help in firefighting, especially in harbours.

Types

Seagoing

(File:Tug and Barge -- New York Harbor (NY) April 2016 (26621401834).jpg|thumb|Tug and barge connected)Seagoing tugs (deep-sea tugs or ocean tugboats) fall into four basic categories:

1. The standard seagoing tug with model bow that tows almost exclusively by way of a wire cable. In some rare cases, such as some USN fleet tugs, a synthetic rope hawser may be used for the tow in the belief that the line can be pulled aboard a disabled ship by the crew owing to its lightness compared to wire cable.
2. {{anchor|notch tug}}The “notch tug” can be secured by way of cables, or more commonly in recent times, synthetic lines that run from the stern of the tug to the stern of the barge. This configuration is generally used in inland waters where sea and swell are minimal because of the danger of parting the push wires. Often, this configuration is employed even without a “notch” on the barge, but in those cases it is preferable to have “push knees” on the tug to stabilize its position. Model bow tugs employing this method of pushing nearly always have a towing winch that can be used if sea conditions render pushing inadvisable. With this configuration, the barge being pushed might approach the size of a small ship, with the interaction of the water flow allowing a higher speed with a minimal increase in power required or fuel consumption.
3. {{anchor|integrated tug and barge|integrated tug barge|integrated tug-barge|ITB|integral unit}}The “integral unit”, or “integrated tug and barge” (ITB), comprises specially designed vessels that lock together in such a rigid and strong method as to be certified as such by authorities (classification societies) such as the American Bureau of Shipping, Lloyd’s Register of Shipping, Indian Register of Shipping, Det Norske Veritas or several others. These units stay combined under virtually any sea conditions and the tugs usually have poor sea-keeping designs for navigation without their barges attached. Vessels in this category are legally considered to be ships rather than tugboats and barges must be staffed accordingly. These vessels must show navigation lights compliant with those required of ships rather than those required of tugboats and vessels undertow.
4. {{anchor|articulated tug barge|articulated tug and barge|articulated tug-barge|ATB}}“Articulated tug and barge” (ATB) units also utilize mechanical means to connect to their barges. The tug slips into a notch in the stern and is attached by a hinged connection, becoming an articulated vehicle. ATBs generally utilize Intercon and Bludworth connecting systems. ATBs are generally staffed as a large tugboat, with between seven and nine crew members. The typical American ATB displays navigational lights of a towing vessel pushing ahead, as described in the 1972 ColRegs.

Harbour

File:Svitzer Tyr - Ystad-2018.jpg|thumb|Svitzer Tyr, a Danish tugboat, built in China in 2011, pictured in 2018 in YstadYstadCompared with seagoing tugboats, harbour tugboats that are employed exclusively as ship assist vessels are generally smaller and their width-to-length ratio is often higher, due to the need for the tugs’ wheelhouse to avoid contact with the hull of a ship, which may have a pronounced rake at the bow and stern. In some ports there is a requirement for certain numbers and sizes of tugboats for port operations with gas tankers.BOOK, Thoresen, Carl A, Port Designer’s Handbook: Recommendations and guidelines, Thomas Telford Books, 2003, 116, 0-7277-3228-5, Also, in many ports, tankers are required to have tug escorts when transiting in harbors to render assistance in the event of mechanical failure. The port generally mandates a minimum horsepower or bollard pull, determined by the size of the escorted vessel. Most ports will have a number of tugs that are used for other purposes than ship assist, such as dredging operations, bunkering ships, transferring liquid products between berths, and cargo ops. These tugs may also be used for ship assist as needed. Modern ship assist tugs are “tractor tugs” that employ azimuthing stern drives (ASD), propellers that can rotate 360 degrees without a rudder, or cycloidal drives (as described below).

River

File:Tug boat pushing log raft near Vancouver.jpg|thumb|right|River tug pushing a log raft in British Columbia near VancouverVancouverRiver tugs are also referred to as towboats or pushboats. Their hull designs would make open ocean operations dangerous. River tugs usually do not have any significant hawser or winch. Their hulls feature a flat front or bow to line up with the rectangular stern of the barge, often with large pushing knees.

Propulsion

File:Arakawa tugboat - 2019 3 25.webm|thumb|A tugboat on the Arakawa River in Tokyo, JapanJapanThe first tugboat, Charlotte Dundas, was built by William Symington in 1801. It had a steam engine and paddle wheels and was used on rivers in Scotland. Paddle tugs proliferated thereafter and were a common sight for a century.In the 1870s schooner hulls were converted to screw tugs. Compound steam engines and scotch boilers provided 300 Indicated Horse Power. Steam tugs were put to use in every harbour of the world towing and ship berthing.Tugboat diesel engines typically produce 500 to 2,500 kW (~ 680 to 3,400 hp), but larger boats (used in deep waters) can have power ratings up to 20,000 kW (~ 27,200 hp){{Citation needed|date=March 2021}}. Tugboats usually have an extreme power:tonnage-ratio; normal cargo and passenger ships have a P:T-ratio (in kW:GRT) of 0.35 to 1.20, whereas large tugs typically are 2.20 to 4.50 and small harbour-tugs 4.0 to 9.5.BOOK, Poulsen, B Lund, Teknisk Leksikon, 2, A/S Forlaget for Faglitteratur København/Oslo, 1971, København, da, The Technological Encyclopaedia, 163–190, 87-573-0023-2, etal, The engines are often the same as those used in railroad locomotives, but typically drive the propeller mechanically instead of converting the engine output to power electric motors, as is common for diesel-electric locomotives. For safety, tugboat engines often feature two of each critical part for redundancy.Bilinski, Marcie B.: “The Workhorse of the Waterways” Massachusetts Office of Coastal Zone Management, Coastlines 2007A tugboat is typically rated by its engine’s power output and its overall 60|to(-)|65|STf|kN}} of bollard pull, which is described as {{convert|15|STf|kN}} above “normal” tugboats.NEWS, Rotor Tug “RT Zoe”,www.marinelink.com/news/article/rotor-tug-rt-zoe/311274.aspx, 19 August 2013, Marineline.com, 13 September 2006, NEWS, Western Marine to build tugboat, vessel for Ctg port,www.hawker.com.bd/news_details_print.php?news_id=213869, 19 August 2013, The Independent, 4 June 2012, 15 April 2016,www.hawker.com.bd/news_details_print.php?news_id=213869," title="web.archive.org/web/20160415013203www.hawker.com.bd/news_details_print.php?news_id=213869,">web.archive.org/web/20160415013203www.hawker.com.bd/news_details_print.php?news_id=213869, dead, , at the Golden GateGolden GateTugboat fenders are made of high-abrasion-resistance rubber with good resilience properties. They are very popular with small port craft owners and tug owners. These fenders are generally made from cut pieces of vehicle tires strung together. Often the fendering on the sides of the tug is composed of large heavy equipment or aircraft tires attached to or hung on the side of the tug. Some fendering is compression moulded in high-pressure thermic-fluid-heated moulds and have excellent seawater resistance, but are not widely used owing to the cost. Tugboat bow fenders are also called beards or bow puds. In the past they were made of rope for padding to protect the bow, but rope rendering is almost never seen in recent times. Other types of tugboat fender include Tug cylindrical fender, W fender, M fender, D fender, and others.WEB,www.chinarubberfender.com/tugboat-fender-types-and-application/, Tugboat Fender Types and Application - Marine Fender System,

Carousel

A recent Dutch innovation is the carousel tug, winner of the Maritime Innovation Award at the Dutch Maritime Innovation Awards Gala in 2006.WEB, novatugnews, Novatug.nl news, Novatug,www.novatug.nl/news/index.php?year=2006&id=7, 2008-01-18,www.novatug.nl/news/index.php?year=2006&id=7," title="web.archive.org/web/20070908150441www.novatug.nl/news/index.php?year=2006&id=7,">web.archive.org/web/20070908150441www.novatug.nl/news/index.php?year=2006&id=7, 2007-09-08, dead, It adds a pair of interlocking rings to the body of the tug, the inner on the boat, the outer on the ship by winch or towing hook. Since the towing point rotates freely, the tug is very difficult to capsize.WEB, novatugprod, Novatug.nl product information, Novatug,novatug.nl/works/index.php, 2008-01-18,www.novatug.nl/works/index.php," title="web.archive.org/web/20080119182444www.novatug.nl/works/index.php,">web.archive.org/web/20080119182444www.novatug.nl/works/index.php, 2008-01-19, dead,

Races

Vintage tugboat races have been held annually in Olympia, Washington, since 1974 during the Olympia Harbor Days Maritime FestivalTugboat races are held annually on Elliott Bay in Seattle,WEB,www.portseattle.org/news/apps/imagelibrary/view.do?art.primarykey=003-00000k-01d,www.portseattle.org/news/apps/imagelibrary/view.do?art.primarykey=003-00000k-01d," title="archive.today/20110723025226www.portseattle.org/news/apps/imagelibrary/view.do?art.primarykey=003-00000k-01d,">archive.today/20110723025226www.portseattle.org/news/apps/imagelibrary/view.do?art.primarykey=003-00000k-01d, dead, July 23, 2011, Port of Seattle, Portseattle.org, 2012-02-18, on the Hudson River at the New York Tugboat Race,“In search of the toughest tug,” by Laurel Graeber, New York Times, August 29, 2008. the Detroit River,WEB,www.tugrace.com/, tugrace.com, tugrace.com, 2013-06-22, 2014-03-23, 2014-04-17,www.tugrace.com/," title="web.archive.org/web/20140417191210www.tugrace.com/,">web.archive.org/web/20140417191210www.tugrace.com/, dead, and the Great Tugboat Race and Parade on the St. Mary’s River.WEB,www.ssm.thegreattugboatrace.ca/Home.php, The Great Tugboat Race, 2012-06-13, 2011-08-28,www.ssm.thegreattugboatrace.ca/Home.php," title="web.archive.org/web/20110828113230www.ssm.thegreattugboatrace.ca/Home.php,">web.archive.org/web/20110828113230www.ssm.thegreattugboatrace.ca/Home.php, dead,

Ballet

(File:South African naval tugs welcoming a new member.jpg|thumb|right|South African Naval tugs perform a “ballet” when welcoming a new member of the fleet.)Since 1980, an annual tugboat ballet has been held in Hamburg harbour on the occasion of the festival commemorating the anniversary of the establishment of a port in Hamburg. On a weekend in May, eight tugboats perform choreographed movements for about an hour to the tunes of waltz and other sorts of dance music.NEWS,www.spiegel.de/sptv/special/0,1518,196592,00.html, Schlepperballett: Kaiserwalzer der Kolosse – SPIEGEL ONLINE – Nachrichten – SPIEGEL TV, Der Spiegel, 19 May 2002, Spiegel.de, 2012-02-18,

Roundups

The Tugboat Roundup is a gathering of tugboats and other vessels in celebration of maritime industry. The Waterford Tugboat Roundup is held in the late summer at the confluence of the Hudson and Mohawk Rivers in Waterford, New York. The tugs featured are river tugs and other tugs re-purposed to serve on the New York State Canal System.WEB,www.tugboatroundup.com/, Waterford Tugboat Roundup, Tugboatroundup.com, 2022-03-08,

In popular culture

Tugboat Annie was the subject of a series of Saturday Evening Post magazine stories featuring the female captain of the tugboat Narcissus in Puget Sound, later featured in the films Tugboat Annie (1933), Tugboat Annie Sails Again (1940) and Captain Tugboat Annie (1945). The Canadian television series The Adventures of Tugboat Annie was filmed in 1957.

Film and television

File:Theodore Tugboat at Murphys cable wharf.jpg|thumb|Theodore TugboatTheodore TugboatTo date, there have been four children’s shows revolving around anthropomorphic tugboats.

• In the late 1980s, 13 episodes were made of TUGS, a series depicting the life of tugboats in the 1920s.
• An American adaptation using edited footage from Tugs followed: Salty’s Lighthouse.
• In the 1975’s Soviet short animation musical film Ð’ порту/ In the sea port a tugboat sang a song: “Through a harbour area”
• One of the creators of Tugs went on to direct Theodore Tugboat.
• Animated preschool series Toot the Tiny Tugboat started broadcasting on Channel 5 Milkshake! in 2014 and on Cartoonito in 2015, with a Welsh-language version airing on S4C Cyw.

“Tugger” is a tugboat in the animated series South Park. He appears in the episode “The New Terrance and Phillip Movie Trailer” as a sidekick for Russell Crowe in a fictitious television series entitled Fightin’ Round The World with Russell Crowe. Tugger follows Crowe as he engages various people in physical conflicts, providing emotional support and comic relief. At one point Tugger even attempts to commit suicide, upon being forced to hear Russell Crowe’s new musical composition.

Literature

(Alphabetical by author)

• The children’s book Scuffy the Tugboat, written by Gertrude Crampton and illustrated by Tibor Gergely and first published in 1946 as part of the Little Golden Books series, follows the adventures of a young toy tugboat who seeks a life beyond the confines of a tub inside his owner’s toy store.
• The Dutch writer Jan de Hartog wrote numerous nautical novels, first in Dutch, then in English.
  • The novel Hollands Glorie, written prior to World War II, was made into a Dutch miniseries in 1978 and concerned the dangers faced by the crews of Dutch salvage tugs.

NEWS,imdb.com/title/tt0178141/, Hollands glorie, IMDb, 2008-01-20, NEWS,query.nytimes.com/gst/fullpage.html?res=9806E1DC1539F937A1575AC0A9649C8B63&sec=&spon=&pagewanted=all, Jan de Hartog, 88, Author of His Own Life, The New York Times, Mel Gussow, Mel Gussow, September 24, 2002, 2008-01-20,

• The novella Stella, concerning the dangers faced by the captains of rescue tugs in the English Channel during World War II, was made into a film entitled The Key in 1958.

NEWS,imdb.com/title/tt0051816/, The Key, IMDb, 2008-01-20,

• The novel The Captain (1967), about the captain of a rescue tug during a Murmansk Convoy, sold over a million copies.

NEWS,www.nnp.org/nni/Publications/Dutch-American/hartog.html, Hartog, Jan De [1914 – 2002], New York State Library, 2008-01-20,

• Its 1986 sequel, The Commodore, features the narrator captaining a fleet of tugs in peace-time.
• Little Toot (1939), written and illustrated by Hardie Gramatky, is a children’s story of an anthropomorphic tugboat child, who wants to help tow ships in a harbour near Hoboken. He’s rejected by the tugboat community and dejectedly drifts out to sea, where he accidentally discovers a shipwrecked liner and a chance to prove his worth. This story was animated as part of the Disney movie Melody Time.
• Farley Mowat’s book The Grey Seas Under tells the tale of a legendary North Atlantic salvage tug, the Foundation Franklin. He later wrote The Serpent’s Coil, which also deals with salvage tugs in the North Atlantic.

Gallery

File:RMS Titanic 2.jpg|Titanic with tugboats, doing sea trials in 1912File:Svitzer Freja tug.jpg|Swedish harbour tug Svitzer Freja in tug-operation (3,600 kW / {{GRT|453|disp=long}})File:ErfgoedLeiden LEI001016475 Stoomsleepboot Mascotte II.jpg|Dutch river tugboat “Mascotte II“File:Bundesarchiv Bild 183-1983-0330-002, Rostock, Ãœberseehafen, Frachter, Schlepper.jpg|German harbour-tug and DDR quick-freighter Karl Marx at Rostock harbourFile:WOONA.JPG|The tugboat Woona in Sydney Harbour, AustraliaFile:Svitzer Tyr - - Ystad-2018.jpg|Danish Svitzer Tyr in Ystad harbour 2018File:Baltsund - Ystad-2019.jpg|Danish Baltsund in Ystad harbour 2019File:Tugs on the starbord of vlcc.jpg|Tugs towing an oil tanker (VLCC)File:Tugboat Nancy Anne.jpg|Tugboat Nancy Anne assisting a tug and barge docking in Rogers City, MichiganFile:Smit Rotterdam.jpg|Oceangoing tug Smit Rotterdam arriving at Rotterdam (1987)File:Watergeus 2008.jpg|Dutch tugboat Watergeus towing a barge in the locks at Kiel-HoltenauFile:Ship and Tugs Sydney 1942 slnsw.jpg|Ship surrounded by tug boats, Sydney, 1942]File:Eppleton Hall.jpg|Eppleton Hall, a paddlewheel tugboat, in San FranciscoFile:Remorqueur VB MALABATA port de Tanger KAUNAS.jpg|Tugboat VB Malabata in Tangier Arbor on 30 october 2023File:Tugboat Delta Cathryn in San Francisco.jpg|Tugboat Delta Cathryn at Port of San Francisco (2023)

See also

• Admiralty tug
• American Waterways Operators
• Azipod
• Barrier Boat
• Charlotte Dundas
• E3 Tug Project
• Fish tug
• HydroTug
• Maritime pilot
• PS Comet
• Pusher (boat)
• Switcher, rail analog
• Tugboats in New York City
• Type V ship

Notes

{{Reflist|35em}}

References

• Jane’s Ocean Technology 1979–80 / Jane’s Yearbooks, 1979 – {{ISBN|0-531-03902-1}}.
• On Tugboats: Stories of Work and Life Aboard / Virginia Thorndike – Down East Books, 2004.
• Under Tow: A Canadian History of Tugs and Towing / Donal Baird – Vanwell Publishing, 277 p., 2003 – {{ISBN|1-55125-076-4}}
• Pacific Tugboats / Gordon Newell – Superior Publishing Company 1957, Seattle Washington.
• Primer of Towing / George H. Reid – Cornell Maritime Press, 1992.

Further reading

• BOOK, A riverman’s lexicon : in Lehman’s terms, J.R. Simpson & Associates, Lehman, Charles F, 2009, Florissant, MO, 978-0-9841503-0-4, Nautical terminology specific to towboating on inland waterways.
• Farrell, Paul (2016). Tugboats Illustrated History, Technology, Seamanship. New York: W. W. Norton & Company. {{ISBN|978-0-393-06931-0}}. A gorgeously detailed guide to the evolution, design, and role of tugboats, from the earliest days of steam to today’s most advanced ocean-going workboats.

External links

{{Commons|Tugboat}}

• A site for boatmen.{{Dead link|date=October 2022 |bot=InternetArchiveBot |fix-attempted=yes }}
• At the Port of Felixstowe
• Beacon Finland Ltd JAK®-ATB Coupling System
• Compagnie Maritime Chambon
• “Docking The World’s Great Liners” Popular Mechanics, May 1930, article on docking large ships in the first half of the 20th century using tugboats
• Intercon ATB Couplers {{Webarchive|url=https://web.archive.org/web/20120318003014www.intercon.com/t-tugbargecouplers.aspx |date=2012-03-18 }}
• NYC’s Annual Tugboat Races
• Tugboat Enthusiasts Society {{Webarchive|url=https://web.archive.org/web/20130910205414www.tugboatenthusiastsociety.org/ |date=2013-09-10 }}
• University of Wisconsin–La Crosse Historic Steamboat Photographs {{Webarchive|url=https://web.archive.org/web/20100927095810digicoll.library.wisc.edu/LaCrosseSteamboat/ |date=2010-09-27 }}
• Voith-Schneider Propeller
• Waterford Tugboat Roundup

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