View source for Bung Tomo-class corvette

{{Short description|Ship class}}
{{Use dmy dates|date=January 2024}}{{Use British English|date=January 2024}}
{|{{Infobox ship begin}}
{{Infobox ship image
|Ship image  = KRI Bung Tomo & KRI Usman Harun.jpg
|Ship caption= KRI ''Bung Tomo'' (357) and KRI ''Usman Harun'' (359)
}}
{{Infobox ship class overview
|Builders             = [[BAE Systems Surface Fleet Solutions|BAE Systems Marine]]
|Operators            = *{{Navy|Brunei}} (planned)
*{{Naval|Indonesia}}
|Class before         = {{Sclass|Diponegoro|corvette|4}} (Indonesia)
|Class after          = 
|Subclasses           = 
|Built range          = 1998–2002<ref>{{Cite web|url=http://www.military-today.com/navy/bung_tomo_class.htm|title=Bung Tomo Class Corvette|website=Military-Today.com|date= |access-date=2022-08-20}}</ref>
|In commission range  = 2014–present
|Total ships building = 
|Total ships planned  = 
|Total ships completed= 3
|Total ships cancelled= 
|Total ships active   = 3
|Total ships laid up  = 
|Total ships lost     = 
|Total ships retired  = 
|Total ships preserved= 
}}{{Infobox ship characteristics
|Hide header       = 
|Header caption    = 
|Ship type         = F2000 [[corvette]] / multi-role light frigate (MRLF)
|Ship displacement = {{Convert|1,940|tonne|0|lk=on}}
|Ship length       = {{Convert|89.9|m|ft|0|abbr=on|lk=on}} [[Waterline length|LWL]], {{Convert|95|m|ft|0|abbr=on}} [[Length overall|LOA]]
|Ship beam         = {{Convert|12.8|m|ft|0|abbr=off}}
|Ship draught      = {{Convert|3.6|m|ft|0|abbr=off}}
|Ship draft        = 
|Ship propulsion   = *4× [[MAN B&W]] / [[Ruston (engine builder)|Ruston]] [[diesel engine]] (total of {{Convert|30.2|MW|shp|0|abbr=on|lk=on}})
*2× shafts
|Ship speed        = {{Convert|30|kn|km/h|0|lk=on}}<ref>{{Cite web|url=http://www4.marinelink.com/en-US/News/Article/Ruston-s-RK270-Engines-Power-Offshore-Patrol-Vessels/325401.aspx|title=Ruston's RK270 engines power offshore patrol vessels|website=MarineLink.com|publisher=[[Maritime News]]|date=1 October 2001|access-date=28 February 2009|url-status=dead|archive-url=https://archive.today/20130128085646/http://www4.marinelink.com/en-US/News/Article/Ruston-s-RK270-Engines-Power-Offshore-Patrol-Vessels/325401.aspx|archive-date=28 January 2013}}</ref>
|Ship range        = {{Convert|5000|nmi|km|-3}} at {{Convert|12|kn|km/h}}<ref name=Range>{{Cite web|url=http://www.naval-technology.com/projects/nakhoda/|title=Nakhoda Ragam class offshore patrol vessels, Brunei|website=Naval-Technology.com|publisher=Naval Technology|access-date=28 February 2009}}</ref>
|Ship complement   = 79 (space for an additional 24)
|Ship sensors      = *[[Ultra Electronics]] / Radamec Series 2500 electro-optic weapons director
*Thales Underwater Systems TMS 4130C1 hull-mounted [[sonar]]
*BAE Systems Insyte AWS-9 E- and F-band air and surface [[3D radar]]
*BAE Insyte 1802SW I/J-band radar trackers
*Kelvin Hughes Type 1007 navigation [[radar]]
*[[Thales Nederland]] Scout radar for surface search<ref name=Range/>
*Thales Sensors Cutlass 242 [[countermeasures]]<ref name=Range/>
|Ship EW           = 
|Ship armament     = *1× [[OTO Melara 76 mm]]
*2× [[DS30B rapid fire cannon|DS 30B REMSIG 30 mm gun]]
*16× VLS for [[Sea Wolf (missile)|Seawolf]] SAM (outdated), planned to be replaced with [[MICA (missile)|VL MICA]] or [[CAMM (missile family)|Sea Ceptor]]
*2× 4 [[Exocet]] MM40 Block II/III missile launchers
*2× triple BAE Systems {{Convert|324|mm|in|adj=on|0}} [[torpedo tubes]], loaded with Italian A244S mod 3
|Ship armour       = 
|Ship aircraft     = 1x [[Eurocopter AS565 Panther]]<ref>{{Cite web|author=Ridzwan Rahmat|date= |url=http://www.janes.com/article/44178/indonesian-navy-to-equip-bung-tomo-corvettes-with-panther-asw-helicopters|title=Indonesian Navy to equip Bung Tomo corvettes with Panther ASW helicopters|website=Janes.com|publisher= |access-date=16 March 2015|url-status=dead|archive-url=https://web.archive.org/web/20141110211414/http://www.janes.com/article/44178/indonesian-navy-to-equip-bung-tomo-corvettes-with-panther-asw-helicopters|archive-date=10 November 2014}}</ref>
|Ship aircraft facilities= Flightdeck, no [[hangar]]
|Ship notes        = 
}}
|}
The '''''Bung Tomo'' class''' is a class of three Indonesian multi-role [[corvette]]s or 'multi-role light frigate' (MRLF) bought from Brunei by [[Indonesia]].<ref>{{Cite web|title=KRI Bung Tomo class|url=https://koarmada1.tnial.mil.id/artikel/detail/758-kri-bung-tomo-class|website=Koarmada1.TNIAL.mil.id|publisher=Komando Armada 1|date=13 October 2021|access-date=21 May 2022}}</ref><ref>{{Cite web|url=https://tni.mil.id/view-66471-tiga-kapal-perang-mlrf-buatan-inggris-perkuat-koarmatim.html|title=Tiga Kapal Perang MLRF Buatan Inggris Perkuat Koarmatim|trans-title=Three British-made MLRF warships strengthen Koarmatim|website=TNI.mil.id|language=id|publisher=[[Indonesian Armed Forces]]|date=7 October 2014|access-date=12 August 2022}}</ref>  They were originally built for the [[Royal Brunei Navy]] (RBN; {{Lang-ms|Tentera Laut Diraja Brunei}}, TLDB), and named '''''Nakhoda Ragam''-class corvettes''', but were ultimately bought by Indonesia and subsequently renamed.<ref>{{Cite web|url=http://www.janes.com/article/34420/former-tni-ad-chief-of-staff-calls-for-ban-on-singapore-warships-entering-indonesian-waters|title=Former TNI-AD chief of staff calls for ban on Singapore warships entering Indonesian waters|website=Janes.com|publisher= |access-date=21 February 2014|url-status=dead|archive-url=https://web.archive.org/web/20140225160509/http://www.janes.com/article/34420/former-tni-ad-chief-of-staff-calls-for-ban-on-singapore-warships-entering-indonesian-waters|archive-date=25 February 2014}}</ref>  The class is named after [[Bung Tomo]], a noted leader of Indonesia's independence movement.

==Background==
[[File:Warships barrow dock.jpg|thumb|left|275px|The ''Nakhoda Ragam''-class ships in [[Barrow-in-Furness]], 2007.|alt=]]
The three vessels were built by [[BAE Systems Marine]] (now [[BAE Systems Maritime - Naval Ships]]).  The contract was awarded to [[GEC-Marconi]] in 1995, and the ships, a variant of the F2000 design, were launched in January 2001, June 2001, and June 2002, at the then BAE Systems Marine yard at [[Scotstoun]], [[Glasgow]].  The customer (Royal Brunei Navy) refused to accept the vessels, due to claims by the Royal Brunei Navy that the ships fail to meet the required specifications;<ref>{{Cite news|url=http://www.janes.com/defence/naval_forces/news/jni/jni050426_2_n.shtml|title=Brunei and BAE Systems dispute ship acceptance|website=Janes.com|publisher=Jane's|date=26 April 2005|access-date=19 April 2007}}</ref> though opinion in the shipyard was that they were too complex for a small navy to operate.<ref name=ShipsMonthly>{{Cite news|url=http://www.shipsmonthly.com/auto/newsdesk/20070710103927ships.html|title=Shipyard deadlock ends|website=ShipsMonthly.com|publisher=[[Ships Monthly]], IPC Media Ltd.|date=10 August 2007|access-date=26 December 2007|url-status=dead|archive-url=https://web.archive.org/web/20071221210705/http://www.shipsmonthly.com/auto/newsdesk/20070710103927ships.html|archive-date=21 December 2007}}</ref>  The contract dispute became the subject of [[arbitration]].<ref>{{Cite news|url=http://www.janes.com/defence/naval_forces/news/jni/jni060908_1_n.shtml|title=BAE Systems, Brunei OPV dispute nears resolution|website=Janes.com|publisher=Jane's|date=8 September 2006|access-date=19 April 2007}}</ref>  When the dispute was settled in favour of BAE Systems, the vessels were handed over to [[Royal Brunei Technical Services]] (RBTS) in June 2007.<ref name=ShipsMonthly/>

In 2007, Brunei contracted the German [[Lürssen]] shipyard to find a new customer for the three ships.  In 2013, Indonesia bought the vessels for {{Currency|380 million|GBP|passthrough=yes}}, or half of the original unit cost.<ref name="jpost">{{Cite news|last=Santosa|first=Novan Iman|date=23 October 2020|url=https://www.thejakartapost.com/news/2020/10/23/used-alutsista-warships-that-safeguard-indonesian-waters.html|title=Used 'alutsista': Warships that safeguard Indonesian waters|website=TheJakartaPost.com|publisher=[[The Jakarta Post]]|access-date=13 February 2022}}</ref>  The ships are now in service with the [[Indonesian Navy]].

The ships were originally armed with [[Exocet|MBDA Exocet]] Block II anti-ship missiles and [[Sea Wolf missile|MBDA Seawolf]] air defence missiles.  The main gun is an Oto Melara 76&nbsp;mm.  The ship also carries two [[torpedo tube]]s, two 30&nbsp;mm remote weapon stations, and has a landing pad for a helicopter.  As 2018, the MBDA Seawolf missile was out of service due to expired, and there was plan to replace it with [[MICA (missile)|VL Mica]]<ref>{{Cite web|url=http://www.naval-technology.com/projects/nakhoda/|title=Nakhoda Ragam class offshore patrol vessel|website=Naval-Technology.com|publisher=Naval Technology|access-date=26 December 2007}}</ref>

==Operational history==
In late December 2014, KRI ''Bung Tomo'' was involved in search and recovery operations of the [[Indonesia AirAsia Flight 8501]] which crashed off the [[Java Sea]] between the islands of [[Belitung]] and [[Borneo]].<ref>{{Cite news|url=http://nasional.kompas.com/read/2014/12/30/17390291/KRI.Bung.Tomo.Berhasil.Angkat.Enam.Jenazah.Diduga.Korban.AirAsia.QZ8501|title=KRI Bung Tomo Berhasil Angkat Enam Jenazah Diduga Korban AirAsia QZ8501|trans-title=KRI Bung Tomo successfully raises six bodies of suspected AirAsia QZ8501 victims|website=Nasional.Kompas.com|language=id|publisher= |date=30 December 2014}}</ref>  Later in early January 2015, KRI ''Usman Harun'' was deployed to search for the [[Flight recorder|black boxes]] as the ship is equipped with the Thales Underwater Systems TMS 4130C1 hull-mounted sonar.<ref>{{Cite web|url=http://therealsingapore.com/content/indonesia-deploys-controversial-kri-usman-harun-qz8501-search-site|title=Indonesia deploys controversial KRI Usman Harun to QZ8501 search site|website=TheRealSingapore.com|publisher= |date=4 January 2015|archive-url=https://web.archive.org/web/20150104062359/http://therealsingapore.com/content/indonesia-deploys-controversial-kri-usman-harun-qz8501-search-site|archive-date=4 January 2015}}</ref><ref>{{Cite news|url=http://www.channelnewsasia.com/news/asiapacific/indonesia-deploys/1566570.html|title=Indonesia deploys controversial KRI Usman Harun for AirAsia plane search|website=ChannelNewsAsia.com|publisher=[[Channel NewsAsia]]|url-status=dead|archive-url=https://web.archive.org/web/20150104071457/http://www.channelnewsasia.com/news/asiapacific/indonesia-deploys/1566570.html|archive-date=4 January 2015}}</ref>  In late April 2021, KRI ''Bung Tomo'' was involved in the search for the then missing {{KRI|Nanggala|402}}<ref>{{Cite web|url=https://www.marinetraffic.com/en/ais/details/ships/shipid:5905500/mmsi:235755000/imo:0/vessel:KRI_BUNG_TOMO_357|title=KRI 357 (Military Ops) registered in United Kingdom - vessel details, current position and voyage information - IMO 0, MMSI 235755000, Call Sign PLJT|website=MarineTraffic.com|publisher= |date= }}</ref>

==Ships of the class==
KRI ''Bung Tomo'' is named after [[Sutomo]], the leader of Indonesian guerrillas during the [[Battle of Surabaya]].  The naming of KRI ''[[John Lie (Indonesian Navy officer)|John Lie]]'' memorialises the first [[Chinese Indonesian]] to be honored as [[List of National Heroes of Indonesia|National Hero of Indonesia]], who was also one of the first high ranking navy commanders during the [[Indonesian National Revolution]].  The naming of KRI ''Usman Harun'' memorialises [[Harun Thohir|Harun Said]] and [[Janatin|Osman Hj Mohd Ali]], who were executed by [[Singapore]] after the [[MacDonald House bombing]], creating a controversy between the two nations.<ref>{{Cite news|last=Cheney-Peters|first=Scott|date=19 February 2014|url=https://thediplomat.com/2014/02/troubled-waters-indonesias-growing-maritime-disputes/|title=Troubled waters: Indonesia's growing maritime disputes|website=TheDiplomat.com|publisher=The Diplomat|access-date=19 February 2014}}</ref>
{|class="wikitable sortable"
![[Pennant number|pennant<br>no.]]!!name!![[Shipbuilder|builder]]!!launched!![[Ship commissioning|commissioned]]!!status
|-
|357 (30)||[[KRI Bung Tomo (357)|KRI ''Bung Tomo'']]<br>(ex-KDB ''Jerambak'')||[[BAE Systems Marine]],<br>[[Scotstoun]]||{{Date table sorting|2002|06|22|format=dmy|abbr=on}} <ref>{{Cite web|url=http://www.clydesite.co.uk/clydebuilt/viewship.asp?id=1650|title=KDB Jerambak|website=ClydeSite.co.uk|publisher=Clydebuilt Database|access-date=8 February 2016|url-status=usurped|archive-url=https://web.archive.org/web/20040910114500/http://www.clydesite.co.uk/clydebuilt/viewship.asp?id=1650|archive-date=10 September 2004}}</ref>||{{Date table sorting|2014|07|11|format=dmy|abbr=on}} <ref name=Janes25072014/>||commissioned
|-
|358 (28)||[[KRI John Lie (358)|KRI ''John Lie'']]<br>(ex-KDB ''Nakhoda Ragam'')||[[BAE Systems Marine]],<br>[[Scotstoun]]||{{Date table sorting|2001|01|13|format=dmy|abbr=on}} <ref>{{Cite web|url=http://www.clydesite.co.uk/clydebuilt/viewship.asp?id=1648|title=KDB Nakhoda Ragam|website=ClydeSite.co.uk|publisher=Clydebuilt Database|access-date=8 February 2016|url-status=usurped|archive-url=https://web.archive.org/web/20060923231324/http://www.clydesite.co.uk/clydebuilt/viewship.asp?id=1648|archive-date=23 September 2006}}</ref>||{{Date table sorting|2014|07|18|format=dmy|abbr=on}} <ref name=Janes25072014>{{Cite web|author=Ridzwan Rahmat|date=23 July 2014|url=http://www.janes.com/article/41158/indonesia-commissions-first-two-of-three-bung-tomo-class-corvettes|title=Indonesia commissions first two of three Bung Tomo-class corvettes|website=Janes.com|publisher=[[Jane's Information Group]]|access-date=25 July 2014}}</ref>||commissioned
|-
|359 (29)||[[KRI Usman Harun (359)|KRI ''Usman Harun'']]<br>(ex-KDB ''Bendahara Sakam'')||[[BAE Systems Marine]],<br>[[Scotstoun]]||{{Date table sorting|2001|06|23|format=dmy|abbr=on}} <ref>{{Cite web|url=http://www.clydesite.co.uk/clydebuilt/viewship.asp?id=1649|title=KDB Bendahara Sakam|website=ClydeSite.co.uk|publisher=Clydebuilt Database|access-date=8 February 2016|url-status=usurped|archive-url=https://web.archive.org/web/20060923230341/http://www.clydesite.co.uk/clydebuilt/viewship.asp?id=1649|archive-date=23 September 2006}}</ref>||{{Date table sorting|2014|07|18|format=dmy|abbr=on}}||commissioned
|}

==Modernisation==
On 10 March 2020 in Jakarta, [[Len Industri]] and Thales signed a contract for the complete modernisation of the Indonesian Navy KRI ''Usman Harun'' multi-role light frigate's mission system, witnessed by King [[Willem-Alexander of the Netherlands]] and [[Ministry of Trade (Indonesia)|Indonesian Minister of Trade]] [[Agus Suparmanto]].  This upgrade for the KRI ''Usman Harun'' is expected to be completed by the end of 2023, and it will considerably extend the service life of the frigate.<ref>{{Cite web|url=https://www.navalnews.com/naval-news/2020/03/len-industri-thales-to-modernise-indonesian-frigate-kri-usman-harun/|title=Len Industri & Thales to modernise Indonesian frigate KRI Usman-Harun|website=NavalNews.com|date=10 March 2020}}</ref>

A final specification was drawn up, including Thales's TACTICOS Combat Management System, [[SMART-S Mk2|SMART-S Mk2 3D]], and [[STIR (radar)|STIR 1.2 EO Mk2 radars]], a Vigile Mk2 ESM, and two new tactical data links – Link Y Mk2 and a tactical data link that will be delivered by PT Len Industri, providing connectivity to Indonesia's military communications network and enabling the corvette to play its full part in wider naval task forces.  The systems' commonality with those on other Indonesian ships would reduce training time and facilitate management and maintenance.  Existing weaponry will also be fully integrated, and a new [[MICA (missile)|VL MICA]] surface-to-air missile system added; a significant boost for the vessel's air defence capability.<ref>{{Cite news|url=https://navyrecognition.com/index.php/news/defence-news/2020/september/8969-thales-to-modernize-multi-role-light-frigate-kri-usman-harun-of-indonesian-navy.html|title=Thales to modernise multi-role light frigate KRI Usman-Harun of Indonesian Navy|website=NavyRecognition.com|publisher= |date=September 2020}}</ref><ref>{{Cite web|url=https://www.thalesgroup.com/en/worldwide/defence-and-security/magazine/indonesias-decisive-move-modernise-its-naval-patrol|title=Indonesia's decisive move to modernise its naval patrol capability|website=ThalesGroup.com|publisher=[[Thales Group]]|date= September 2020}}</ref>

==See also==
*{{Sclass|Darussalam|offshore patrol vessel|1}} – four ships later commissioned by the [[Royal Brunei Navy]]
*{{Sclass|Lekiu|frigate|1}} – two other F2000-derived ships built for the [[Royal Malaysian Navy]]

==References==
{{Reflist}}

==External links==
{{Commons category|Bung Tomo-class corvette}}
*[http://www.naval-technology.com/projects/nakhoda/ Nakhoda Ragam class corvette] — at Naval-Technology.com
*[https://web.archive.org/web/20060923231324/http://www.clydesite.co.uk/clydebuilt/viewship.asp?id=1648 Clydebuilt ships] — picture
*[http://www.ocnus.net/artman2/publish/Business_1/How_Lurssen_Wooed_Brunei.shtml Story by ocnus.net]

{{Royal Brunei Navy ship classes}}
{{Bung Tomo-class corvettes}}
{{Indonesian Navy active ship classes}}
{{Portal bar|History|Asia}}
{{Authority control}}

[[Category:Bung Tomo-class corvettes| ]]
[[Category:Corvette classes]]
[[Category:Corvettes of the Indonesian Navy]]