A winch is a mechanical device that is used to pull in or let out or otherwise adjust the tension of a rope or wire rope.
Alexander L. Kielland was a Norwegian semi-submersible drilling rig that, on 27 March 1980, capsized in the Ekofisk oil field in the North Sea, killing 123 people. The capsize was the worst disaster in Norwegian waters since the Second World War. The rig, located approximately 320 km east of Dundee, Scotland, was owned by the Stavanger Drilling Company of Norway and was on hire to the U.S. company Phillips Petroleum at the time of the disaster. The rig was named after the Norwegian writer Alexander Lange Kielland.
A platform supply vessel (PSV) is a ship specially designed to supply offshore oil and gas platforms. These ships range from 50 to 100 metres in length and accomplish a variety of tasks. The primary function for most of these vessels is logistic support and transportation of goods, tools, equipment and personnel to and from offshore oil platforms and other offshore structures. In recent years, a new generation of platform supply vessels entered the market, usually equipped with Class 1 or Class 2 dynamic positioning system.
USS Grapple (ARS-53) is a Safeguard-class rescue and salvage ship in the United States Navy. Her home port is Norfolk, Virginia. On 13 July 2006 Grapple was decommissioned from US Navy service and converted to civilian operation by Military Sealift Command. She was redesignated as USNS Grapple.
USNS Safeguard (T-ARS-50),, is the lead ship of her class and the second United States Navy ship of that name.
AHTSBourbon Dolphin was an anchor handling tug supply vessel of Bourbon Offshore Norway. The ship capsized off the coast of Shetland on April 12, 2007, and sank three days later while preparations were being made to tow her to shore.
USNS Apache (T-ATF-172), the fifth United States Navy ship of the name, is the last of the Powhatan class of fleet ocean tugs. Apache was delivered to the U.S. Navy in 1981. She was operated by Military Sealift Command and crewed by 18 civil service mariners (CIVMARS). She is designed to provide the Navy with towing service, and when augmented by Navy divers, assist in the recovery of downed aircraft and ships. There are quarters on board for up to 22 additional personnel. She was deactivated on 26 August 2022.
Bollard pull is a conventional measure of the pulling power of a watercraft. It is defined as the force exerted by a vessel under full power, on a shore-mounted bollard through a tow-line, commonly measured in a practical test under test conditions that include calm water, no tide, level trim, and sufficient depth and side clearance for a free propeller stream. Like the horsepower or mileage rating of a car, it is a convenient but idealized number that must be adjusted for operating conditions that differ from the test. The bollard pull of a vessel may be reported as two numbers, the static or maximum bollard pull - the highest force measured - and the steady or continuous bollard pull, the average of measurements over an interval of, for example, 10 minutes. An equivalent measurement on land is known as drawbar pull, or tractive force, which is used to measure the total horizontal force generated by a locomotive, a piece of heavy machinery such as a tractor, or a truck,, which is utilized to move a load.
Siem Offshore is an international offshore and subsea shipping company registered on the Cayman Islands with its main offices in Kristiansand, Norway.
Colombo Dockyard PLC (CDPLC) is a shipbuilding company in Sri Lanka and is based in Colombo. It has built both military and civilian vessels for both local and overseas clients.
In ship design, an inverted bow is a ship's or large boat's bow whose farthest forward point is not at the top. The result may somewhat resemble a submarine's bow. Inverted bows maximize the length of waterline and hence the hull speed, and have often better hydrodynamic drag than ordinary bows. On the other hand, they have very little reserve buoyancy and tend to dive under waves instead of piercing or going over them.
Atlantic Osprey is an anchor handling tug supply (AHTS) vessel, launched 17 April 2003.
An emergency tow vessel, also called emergency towing vessel, (ETV) is a multi purpose boat used by state authorities to tow disabled vessels on high seas in order to prevent dangers to man and environment. The disabled vessel is either towed to a safe haven or kept in place against wind and current until commercial assistance by tug boats has arrived on site or until it has been repaired to the extent of being able to manoeuvre on its own. The need for ETVs as a preventive measure has arisen since the number of available commercial salvage tugs was reduced while potential dangers from individual vessels have increased. E.g. Spain has fourteen, Turkey has eleven, Germany operates eight, Norway has seven, France has five, Sweden three and the Netherlands, Poland, South Africa, Iceland and Finland each have one official emergency tug boat. Australia also operates emergency response vessels. The United Kingdom's four strong ETV fleet was to be disbanded in September 2011 due to budget cuts but the two vessels operating in Scottish waters received an extension of contract until the end of 2011.
USNS Grasp (T-ARS-51) is a Safeguard-class rescue and salvage ship, the second United States Navy ship of that name.
Vladimir Ignatyuk is a Russian icebreaking anchor handling tug supply vessel. She was built by Burrard-Yarrows Corporation in Canada in 1983 as Kalvik as part of an Arctic drilling system developed by BeauDril, the drilling subsidiary of Gulf Canada Resources. After the offshore oil exploration in the Beaufort Sea ended in the early 1990s, she was sold to the Canadian shipping company Fednav in 1997 and renamed Arctic Kalvik. In 2003, she was purchased by Murmansk Shipping Company and transferred to Russia.
USS Avoyel (ATF-150) was an Navajo-class fleet tug built for the United States Navy during World War II. She was the only U.S. Naval vessel to bear the name.
Aiviq is an American icebreaking anchor handling tug supply vessel (AHTS) owned by Edison Chouest Offshore (ECO). The $200 million vessel was built in 2012 by North American Shipbuilding in Larose, Louisiana and LaShip in Houma, Louisiana. She was initially chartered by Royal Dutch Shell to support oil exploration and drilling in the Chukchi Sea off Alaska where the primary task of the vessel was towing and laying anchors for drilling rigs, and oil spill response.
NOAAS Ferrel was an American hydrographic survey ship that was in commission in the National Oceanic and Atmospheric Administration (NOAA) from 1970 to 2002. Prior to her NOAA career, she was in commission in the United States Coast and Geodetic Survey from 1968 to 1970 as USC&GS Ferrel.
The Safeguard class is a class of Towing, Salvage and Rescue Ship under the United States Navy.
The Bourbon Argos is an anchor handling tug supply vessel from the oil & gas offshore marine servicing company Bourbon Offshore Greenmar, and sails under the Luxembourg flag.
