Besat / Qaaem, Qaem, or Ghaaem Submarine
By some accounts Iran has so far launched different classes of advanced submarines including Fateh, Ghadir, Qaem and Nahang. Besat class submarines, also known as Qaaem, Qaem, or Ghaaem is an Iranian designed class of submarines that have been "currently" under construction since 2008 or 2011. The class is vsriously reported as having a displacement of 1,000 or 1,200 tons, and is described as both "semi-heavy" and "heavy". Iranian officials regularly announce alleged breakthroughs in their own domestic armament industry. In 2012 and 2013, for example, they have announced new drones, aircraft, antiaircraft missiles, and submarines, and have even promised to build an aircraft carrier. Except for the aircraft carrier and perhaps the fighter jet, there is usually some kernel of truth to the Iranian claims, although they are seldom as advanced as Iranian officials might claim.
Iran's armed forces "have been the protector of the security of the strategic Strait of Hormuz and regards the security of this waterway as vital for itself and the countries of the region," Defense Minister Mostafa Mohammad Najjar said 25 August 2008. Najjar, whose remarks were carried by Iran's ISNA news agency, was speaking at the inauguration of a submarine production line. The agency said it was for a "semi-heavy" class of submarine called Qaim but did not give details.
Mansour Maqsoudlou of the Navy said 20 September 2011 Iran was "currently" designing multi-purpose submarines. Fateh submarine of medium class and Besat of heavy class are currently under construction in the country, Maqsoudlou added.
Iran will release two new submairines of own production, Deputy of Iran's Army commander on research issues Farkhad Amiri said, Fars reported 18 January 2012. Amiri added that after the Fateh submarine is released, Iran plans to start making a 1,200 ton Besat submarine. He said that the new Besat submarine will be made using new technology. Iran will equip four submarines (Fateh, Gadir, Tariq and a 1,200 ton Besat submarine) with underwater to surface missile launching systems for land targeting, Amiri said.
Amiri added that another addition that Iranian own made submarines will have fuel-cells. Fuel-cells are electro-chemical energy converters. The advantage of a fuel-cell system aboard submarines is their air independent operation. They use an energy carrier (e.g. hydrogen or methanol) and an oxidation agent (liquid oxygen/ LOx), all of which are stored on board. In the fuel cells hydrogen and oxygen are combined to water, thus giving off electricity (DC). Thanks to a very high efficiency, the amount of waste heat is very low. The electric energy produced is then fed to the submarine's main switchboard. The amount of stored reactants combined with the excellent efficiency of the energy converting fuel cells provide the submarine with a zero-emission, pollution free alternative power source.
Iran is building a new submarine, called Be'sat, which will be capable of firing cruise missiles and laying underwater mines, the country's Fars News Agency reported 26 February 2015. The submarine will be 60 meters long and have a displacement of over 1,300 tons. It will have six bays for torpedoes and marine cruise missiles.
"The Navy's new subsurface vessel will be ready and launched soon to enhance the Army's power," Iranian Army Commander Major General Ataollah Salehi told reporters in December 2014. The Be'sat, will be Iran's biggest domestically made submarine. The Iranian Navy also operates three Russian Kilo-class submarines with a displacement of 2,325 tons and six torpedo tubes but no cruise missile capacity.
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