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.
The Ville-class harbour tugboats are a class of tugboats employed by the Royal Canadian Navy.
CFAV Firebrand is a Fire-class fireboat in the Royal Canadian Navy designed by Robert Allan Ltd. Firebrand is based in CFB Esquimalt, on Vancouver Island. Her sister ship CFAV Firebird was based in CFB Halifax and decommissioned in 2014.
The Fire-class fireboats/yard tractor tugs were two fireboats operated by the Royal Canadian Navy. The two vessels are CFAV Firebrand (YTR 562) and CFAV Firebird (YTR 561).
The Arga class of tugboats are a series of six service watercraft being built by Tebma Shipyard Limited in Malpe, for the Indian Navy.
The Bhim class of tugboats is a class of service watercraft built by Tebma Shipyard Limited, a subsidiary of Bharati Shipyard Ltd, for the Indian navy.
The Madan Singh class of tugboats are series of service watercraft built by Tebma Shipyard Limited, for Indian navy during 1999. Propulsion is provided by Voith Schneider Propellers. The Nakul-class tugboat is a follow-up order of the Madan Singh-class tugboat.
The Anand class tugboats are a series of service watercraft built by Goa Shipyard Limited, for the Indian Navy. Tugs of this class have a 6-tonne bollard pull.
INS Gaj is an offshore tugboat built by Hindustan Shipyard Limited, Visakhapatnam for the Indian Navy. It operated under the navy's Eastern Naval Command.
The Gaj class offshore tugboats are a series of two auxiliary watercraft built by Garden Reach Shipbuilders & Engineers Ltd., Kolkata, for the Indian Navy. The vessels in the class are Indian Navy's biggest tugboats and can be used for towing aircraft carriers.
The Balram class of tugboats is a series of service watercraft built by Goa Shipyard Limited for the Indian navy. Each tug in the class has a rated capacity of 20 tonnes bollard pull. They are powered by twin Kirloskar SEMT-Pielistick of total 3,200 hp (2,400 kW). They are also fitted with three monitors for fire fighting. INS Bajrang and INS Balram are stationed at Mumbai.
The Bahadur class tugboats are a series of service watercraft built by Goa Shipyard Limited, for the Indian Navy. They have a rated bollard pull of 10 tonnes.
Nakul class of tugboats are series of service watercraft built by Tebma Shipyard Limited., for Indian navy during 2004. The vessels in the class have a rated capacity of 25 ton bollard pull. Propulsion is provided by Voith Schneider Propellers. It is a follow-up of Madan Singh class tugboat.
B.C. Dutt class of tugboats are series of service watercraft built by Tebma Shipyard Limited, for Indian navy during 1998-99. The vessels in the class have a rated capacity of 25 ton bollard pull. The propulsion is provided by Schottel Rudder Propeller (SRP). Bhim class tugboat is a follow-up order of B.C. Dutt class tugboat.
The Indian Navy has been focusing on developing indigenous platforms, systems, sensors and weapons as part of the nation's modernisation and expansion of its maritime forces. As of November 2022, the Indian Navy has 45 vessels of various types under construction, including destroyers; frigates; corvettes; conventional-powered and nuclear-powered submarines and various other ship, and plans to build a strong navy of 200 vessels and 500 aircraft by 2050. According to Chief of Naval Staff's statement in December 2020, India has transformed from a buyer's navy to a builder's navy.
INS Buland is a 25 tonne bollard pull tugboat built by Hindustan Shipyard for the Indian Navy. It is the third ship of the series of 25-ton bollard pull tugboats after INS Balwan and INS Sahayak that were built within 10 months and delivered in January 2016 in time for International Fleet Review 2016. After the sea trials, the ship was flagged off by Commander A.S. Mitra (retired), Director (Shipbuilding) on 15 November 2016 and joined the Indian Navy at its home port of Port Blair.
INS Dhruv (A40) is a research vessel and missile range instrumentation ship built by India's Hindustan Shipyard Limited (HSL). The ship was earlier only known by its shipyard designated yard number as VC-11184.
The HSL-class fleet support vessels are a series of five fleet tanker planned to be built by Hindustan Shipyard (HSL), Visakhapatnam with technology transfer from Turkey's Anadolu Shipyard for the Indian Navy. The deal is expected to be signed in FY2021–22. The primary role of the vessels would be to replenish ships of the Indian Navy with fuel, food and various other supplies. With a length of 230 m and displacement of 45,000 tonnes, these will be the heaviest and the second largest vessels to be in operation in the Indian Navy fleets before 2030.
The Nistar class is a series of two diving support vessels being built by Hindustan Shipyard (HSL) for the Indian Navy. The deal was signed on 20 September 2018 with the delivery of the ships is scheduled to commence from July 2023. The primary role of the vessels to support the Indian Navy's submarine fleet and meet various operational requirements such as submarine rescue, deep sea diving operations, sustained patrolling, non combatant evacuation operations and search and rescue (SAR).
Indian Navy 