Bayandor-class corvette

{{Short description|Iranian patrol frigate}}

{{more footnotes needed|date=January 2013}}

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{{Infobox ship begin}} {{Infobox ship image |Ship image=Marine Security Belt 2019 (75).jpg |Ship caption=IRIS Bayandor }} {{Infobox ship class overview |Name=Bayandor class |Builders=Levingston Shipbuilding, Texas |Operators=Islamic Republic of Iran Navy |Class before= |Class after= |Subclasses= |Cost= |Built range=1962–1964; 1967–1969 |In service range=1964–present |Total ships building= |Total ships planned= |Total ships completed=4 |Total ships cancelled= |Total ships active=2 |Total ships laid up= |Total ships lost=2 |Total ships retired= |Total ships preserved= }} {{Infobox ship characteristics |Hide header= |Header caption= |Ship type=Corvette |Ship tonnage= |Ship displacement=900 tons (1135 tons full load) |Ship length={{convert|84|m|abbr=on}} |Ship beam={{convert|10.1|m|abbr=on}} |Ship height= |Ship draught={{convert|3.1|m|abbr=on}} |Ship power= |Ship propulsion=2 Fairbanks-Morse 38TD8 diesels on 2 shafts |Ship speed={{convert|20|kn|km/h|0}} on diesels |Ship range={{convert|2500|nmi|km

3|abbr=on}} |Ship complement=140 |Ship crew= |Ship time to activate= |Ship sensors= |Ship EW= |Ship armament=*4 × C-802 anti-ship cruise missiles 1 × 76/62 mm Fajr-27 dual purpose naval gun 1 × twin 40/56 mm AAA 2 × single 20 mm AAA 2 × 0.50cal machine guns 2 x triple light torpedo launchers |Ship armour= |Ship armor= |Ship aircraft= |Ship aircraft facilities= |Ship notes= }}

The Bayandor class comprises four Iranian patrol frigates originally built for the US Navy as the PF-103 class. It was named after Gholamali Bayandor. Only two are currently in service. Two were sunk in 1980 by Iraqi Exocet ASM and aerial bombs.

These corvettes were built in Texas under the MAP (Mutual Assistance Program), wherein ships were built from US Navy funding and transferred immediately upon completion to allied navies. Two half-sisters serve in the Royal Thai navy.

As delivered, they were equipped with depth charge racks and Mk6 K-Guns aft; and a Mk10 Hedgehog forward. These were removed during the Iran-Iraq War. A ZU-23 anti-aircraft gun was added in 1982; this in turn was replaced by an Oerlikon 20 mm gun in 1990.

On 11 June 2013, after a 20-month refit and overhaul Iran's navy launched the corvette Bayandor, the program included repairing of the main engines, overhaul of the heat converters and fuel systems, modernizing of the monitoring systems and installation of new FCS and radar, and adding a Fajr-27 76 mm dual purpose Oto Melara type rapid fire cannon, and a dual 40 mm anti-aircraft cannon, in addition to two double canister Noor anti-ship missile launchers.{{cite web|url=http://www.mashreghnews.ir/fa/news/222507/%D9%86%D8%A7%D9%88%D8%B4%DA%A9%D9%86-%D8%AC%D8%AF%DB%8C%D8%AF-%D8%A8%D8%A7%DB%8C%D9%86%D8%AF%D8%B1-%D8%A8%D9%87-%D9%86%D8%AF%D8%A7%D8%AC%D8%A7-%D9%BE%DB%8C%D9%88%D8%B3%D8%AA |title= The new destroyer joined the bayandor ndaja |accessdate=June 11, 2013 |url-status=dead |archiveurl=https://web.archive.org/web/20130613143031/http://www.mashreghnews.ir/fa/news/222507/%D9%86%D8%A7%D9%88%D8%B4%DA%A9%D9%86-%D8%AC%D8%AF%DB%8C%D8%AF-%D8%A8%D8%A7%DB%8C%D9%86%D8%AF%D8%B1-%D8%A8%D9%87-%D9%86%D8%AF%D8%A7%D8%AC%D8%A7-%D9%BE%DB%8C%D9%88%D8%B3%D8%AA |archivedate=June 13, 2013 }}{{cite web |url=http://www.mehrnews.com/detail/Photo/2073784#ad-image-0 |script-title=fa:الحاق ناوشکن شهید بایندر به ناوگان نیروی دریایی ارتش |publisher=Mehr News Agency |language=fa|accessdate=29 June 2015 |date=11 June 2013 }}{{cite web|url=http://www.farsnews.com/imgrep.php?nn=13920321000645 |accessdate=June 11, 2013 |title=Iran Launches New Modernized Destroyer |url-status=dead |archiveurl=https://web.archive.org/web/20130614191738/http://www.farsnews.com/imgrep.php?nn=13920321000645 |archivedate=June 14, 2013 }}